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contrib/tzdata: import tzdata 2024b

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Changes: https://github.com/eggert/tz/blob/2024b/NEWS

MFC after:	3 days
This commit is contained in:
Philip Paeps 2024-09-06 09:37:36 +08:00
commit e273650f2c
22 changed files with 1768 additions and 1241 deletions
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18
contrib/tzdata/CONTRIBUTING
View File

@ -23,10 +23,10 @@ such as renaming, adding or removing zones, please read
"Theory and pragmatics of the tz code and data"
<https://www.iana.org/time-zones/repository/theory.html>.
It is also good to browse the mailing list archives
<https://mm.icann.org/pipermail/tz/> for examples of patches that tend
to work well. Additions to data should contain commentary citing
reliable sources as justification. Citations should use "https:" URLs
if available.
<https://lists.iana.org/hyperkitty/list/tz@iana.org/>
for examples of patches that tend to work well.
Changes should contain commentary citing reliable sources.
Citations should use "https:" URLs if available.
For changes that fix sensitive security-related bugs, please see the
distribution's 'SECURITY' file.
@ -63,12 +63,16 @@ If you use Git the following workflow may be helpful:
* Edit source files. Include commentary that justifies the
changes by citing reliable sources.
* Debug the changes, e.g.:
* Debug the changes locally, e.g.:
make check
make install
make TOPDIR=$PWD/tz clean check install
./zdump -v America/Los_Angeles
Although builds assume only basic POSIX, they use extra features
if available. 'make check' accesses validator.w3.org unless you
lack 'curl' or use 'make CURL=:'. If you have the latest GCC,
"make CFLAGS='$(GCC_DEBUG_FLAGS)'" does extra checking.
* For each separable change, commit it in the new branch, e.g.:
git add northamerica

412
contrib/tzdata/Makefile
View File

@ -3,17 +3,17 @@
# 2009-05-17 by Arthur David Olson.
# Request POSIX conformance; this must be the first non-comment line.
.POSIX:
# On older platforms you may need to scrounge for a POSIX-conforming 'make'.
# For example, on Solaris 10 (2005), use /usr/sfw/bin/gmake or
# /usr/xpg4/bin/make, not /usr/ccs/bin/make.
# On older platforms you may need to scrounge for POSIX conformance.
# For example, on Solaris 10 (2005) with Sun Studio 12 aka Sun C 5.9 (2007),
# use 'PATH=/usr/xpg4/bin:$PATH make CC=c99'.
# To affect how this Makefile works, you can run a shell script like this:
#
# #!/bin/sh
# make CC='gcc -std=gnu11' "$@"
# make CC='gcc -std=gnu23' "$@"
#
# This example script is appropriate for a pre-2017 GNU/Linux system
# where a non-default setting is needed to support this package's use of C99.
# This example script is appropriate for a circa 2024 GNU/Linux system
# where a non-default setting enables this package's optional use of C23.
#
# Alternatively, you can simply edit this Makefile to tailor the following
# macro definitions.
@ -53,7 +53,7 @@ DATAFORM= main
LOCALTIME= Factory
# The POSIXRULES macro controls interpretation of POSIX-2017.1-like TZ
# The POSIXRULES macro controls interpretation of POSIX-like TZ
# settings like TZ='EET-2EEST' that lack DST transition rules.
# If POSIXRULES is '-', no template is installed; this is the default.
# Any other value for POSIXRULES is obsolete and should not be relied on, as:
@ -132,8 +132,9 @@ LIBDIR = $(TOPDIR)/$(USRDIR)/lib
# Types to try, as an alternative to time_t.
TIME_T_ALTERNATIVES = $(TIME_T_ALTERNATIVES_HEAD) $(TIME_T_ALTERNATIVES_TAIL)
TIME_T_ALTERNATIVES_HEAD = int_least64_t
TIME_T_ALTERNATIVES_TAIL = int_least32_t uint_least32_t uint_least64_t
TIME_T_ALTERNATIVES_HEAD = int_least64_t.ck
TIME_T_ALTERNATIVES_TAIL = int_least32_t.ck uint_least32_t.ck \
uint_least64_t.ck
# What kind of TZif data files to generate. (TZif is the binary time
# zone data format that zic generates; see Internet RFC 8536.)
@ -219,6 +220,7 @@ LDLIBS=
# than what POSIX specifies, assuming local time is UT.
# For example, N is 252460800 on AmigaOS.
# -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r
# on POSIX platforms predating POSIX.1-2024
# -DHAVE_DECL_ENVIRON if <unistd.h> declares 'environ'
# -DHAVE_DECL_TIMEGM=0 if <time.h> does not declare timegm
# -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows)
@ -229,7 +231,7 @@ LDLIBS=
# where LDLIBS also needs to contain -lintl on some hosts;
# -DHAVE_GETTEXT=0 to avoid using gettext
# -DHAVE_INCOMPATIBLE_CTIME_R if your system's time.h declares
# ctime_r and asctime_r incompatibly with the POSIX standard
# ctime_r and asctime_r incompatibly with POSIX.1-2017 and earlier
# (Solaris when _POSIX_PTHREAD_SEMANTICS is not defined).
# -DHAVE_INTTYPES_H=0 if <inttypes.h> does not work*+
# -DHAVE_LINK=0 if your system lacks a link function
@ -261,8 +263,11 @@ LDLIBS=
# -DRESERVE_STD_EXT_IDS if your platform reserves standard identifiers
# with external linkage, e.g., applications cannot define 'localtime'.
# -Dssize_t=long on hosts like MS-Windows that lack ssize_t
# -DSUPPORT_C89 if the tzcode library should support C89 callers+
# However, this might trigger latent bugs in C99-or-later callers.
# -DSUPPORT_C89=0 if the tzcode library should not support C89 callers
# Although -DSUPPORT_C89=0 might work around latent bugs in callers,
# it does not conform to POSIX.
# -DSUPPORT_POSIX2008 if the library should support older POSIX callers+
# However, this might cause problems in POSIX.1-2024-or-later callers.
# -DSUPPRESS_TZDIR to not prepend TZDIR to file names; this has
# security implications and is not recommended for general use
# -DTHREAD_SAFE to make localtime.c thread-safe, as POSIX requires;
@ -274,7 +279,7 @@ LDLIBS=
# -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory;
# the default is system-supplied, typically "/usr/lib/locale"
# -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
# DST transitions for POSIX.1-2017-style TZ strings lacking them,
# DST transitions for proleptic format TZ strings lacking them,
# in the usual case where POSIXRULES is '-'. If not specified,
# TZDEFRULESTRING defaults to US rules for future DST transitions.
# This mishandles some past timestamps, as US DST rules have changed.
@ -302,23 +307,25 @@ LDLIBS=
#
# * Options marked "*" can be omitted if your compiler is C23 compatible.
# * Options marked "+" are obsolescent and are planned to be removed
# once the code assumes C99 or later, say in the year 2029.
# once the code assumes C99 or later (say in the year 2029)
# and POSIX.1-2024 or later (say in the year 2034).
#
# Select instrumentation via "make GCC_INSTRUMENT='whatever'".
GCC_INSTRUMENT = \
-fsanitize=undefined -fsanitize-address-use-after-scope \
-fsanitize-undefined-trap-on-error -fstack-protector
# Omit -fanalyzer from GCC_DEBUG_FLAGS, as it makes GCC too slow.
GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 \
$(GCC_INSTRUMENT) \
-Wall -Wextra \
-Walloc-size-larger-than=100000 -Warray-bounds=2 \
-Wbad-function-cast -Wbidi-chars=any,ucn -Wcast-align=strict -Wdate-time \
-Wdeclaration-after-statement -Wdouble-promotion \
-Wduplicated-branches -Wduplicated-cond \
-Wduplicated-branches -Wduplicated-cond -Wflex-array-member-not-at-end \
-Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
-Wimplicit-fallthrough=5 -Winit-self -Wlogical-op \
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
-Wmissing-declarations -Wmissing-prototypes \
-Wmissing-variable-declarations -Wnested-externs \
-Wnull-dereference \
-Wold-style-definition -Woverlength-strings -Wpointer-arith \
-Wshadow -Wshift-overflow=2 -Wstrict-overflow \
@ -327,10 +334,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
-Wsuggest-attribute=const -Wsuggest-attribute=format \
-Wsuggest-attribute=malloc \
-Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
-Wtrampolines -Wundef -Wuninitialized -Wunused-macros -Wuse-after-free=3 \
-Wtrampolines -Wundef -Wunused-macros -Wuse-after-free=3 \
-Wvariadic-macros -Wvla -Wwrite-strings \
-Wno-address -Wno-format-nonliteral -Wno-sign-compare \
-Wno-type-limits
-Wno-format-nonliteral -Wno-sign-compare
#
# If your system has a "GMT offset" field in its "struct tm"s
# (or if you decide to add such a field in your system's "time.h" file),
@ -341,9 +347,8 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# Similarly, if your system has a "zone abbreviation" field, define
# -DTM_ZONE=tm_zone
# and define NO_TM_ZONE to suppress any guessing.
# Although these two fields are not required by POSIX.1-2017,
# POSIX 202x/D4 requires them and they are widely available
# on GNU/Linux and BSD systems.
# Although POSIX.1-2024 requires these fields and they are widely available
# on GNU/Linux and BSD systems, some older systems lack them.
#
# The next batch of options control support for external variables
# exported by tzcode. In practice these variables are less useful
@ -353,7 +358,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# # -DHAVE_TZNAME=0 # do not support "tzname"
# # -DHAVE_TZNAME=1 # support "tzname", which is defined by system library
# # -DHAVE_TZNAME=2 # support and define "tzname"
# # to the "CFLAGS=" line. "tzname" is required by POSIX.1-1988 and later.
# # to the "CFLAGS=" line. Although "tzname" is required by POSIX.1-1988
# # and later, its contents are unspecified if you use a geographical TZ
# # and the variable is planned to be removed in a future POSIX edition.
# # If not defined, the code attempts to guess HAVE_TZNAME from other macros.
# # Warning: unless time_tz is also defined, HAVE_TZNAME=1 can cause
# # crashes when combined with some platforms' standard libraries,
@ -364,7 +371,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# # -DUSG_COMPAT=1 # support, and variables are defined by system library
# # -DUSG_COMPAT=2 # support and define variables
# # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by Unix
# # Systems Group code and are required by POSIX.1-2008 and later (with XSI).
# # Systems Group code and are required by POSIX.1-2008 and later (with XSI),
# # although their contents are unspecified if you use a geographical TZ
# # and the variables are planned to be removed in a future edition of POSIX.
# # If not defined, the code attempts to guess USG_COMPAT from other macros.
# #
# # To support the external variable "altzone", add
@ -428,18 +437,13 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
# The name of a POSIX-like library archiver, its flags, C compiler,
# linker flags, and 'make' utility. Ordinarily the defaults suffice.
# The commented-out values are the defaults specified by POSIX.1-202x/D4.
# The commented-out values are the defaults specified by POSIX.1-2024.
#AR = ar
#ARFLAGS = -rv
#CC = c17
#LDFLAGS =
#MAKE = make
# For leap seconds, this Makefile uses LEAPSECONDS='-L leapseconds' in
# submake command lines. The default is no leap seconds.
LEAPSECONDS=
# Where to fetch leap-seconds.list from.
leaplist_URI = \
https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
@ -461,7 +465,7 @@ ZFLAGS=
# How to use zic to install TZif files.
ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)'
# The name of a POSIX-compliant 'awk' on your system.
# mawk 1.3.3 and Solaris 10 /usr/bin/awk do not work.
@ -480,6 +484,7 @@ KSHELL= /bin/bash
# Name of curl <https://curl.haxx.se/>, used for HTML validation
# and to fetch leap-seconds.list from upstream.
# Set CURL=: to disable use of the Internet.
CURL= curl
# Name of GNU Privacy Guard <https://gnupg.org/>, used to sign distributions.
@ -533,21 +538,28 @@ OK_LINE= '^'$(OK_CHAR)'*$$'
# Flags to give 'tar' when making a distribution.
# Try to use flags appropriate for GNU tar.
GNUTARFLAGS= --format=pax --pax-option='delete=atime,delete=ctime' \
GNUTARFLAGS= --format=pax --pax-option=delete=atime,delete=ctime \
--numeric-owner --owner=0 --group=0 \
--mode=go+u,go-w --sort=name
TARFLAGS= `if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \
then echo $(GNUTARFLAGS); \
else :; \
fi`
SETUP_TAR= \
export LC_ALL=C && \
if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; then \
TAR='tar $(GNUTARFLAGS)'; \
else \
TAR=tar; \
fi
# Flags to give 'gzip' when making a distribution.
GZIPFLAGS= -9n
# When comparing .tzs files, use GNU diff's -F'^TZ=' option if supported.
# This makes it easier to see which Zone has been affected.
DIFF_TZS= diff -u$$(! diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1 \
|| echo ' -F^TZ=')
SETUP_DIFF_TZS = \
if diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1; then \
DIFF_TZS='diff -u -F^TZ='; \
else \
DIFF_TZS='diff -u'; \
fi
# ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib.
RANLIB= :
@ -561,8 +573,8 @@ RANLIB= :
TZCOBJS= zic.o
TZDOBJS= zdump.o localtime.o asctime.o strftime.o
DATEOBJS= date.o localtime.o strftime.o asctime.o
TZDOBJS= zdump.o localtime.o strftime.o
DATEOBJS= date.o localtime.o strftime.o
LIBSRCS= localtime.c asctime.c difftime.c strftime.c
LIBOBJS= localtime.o asctime.o difftime.o strftime.o
HEADERS= tzfile.h private.h
@ -579,8 +591,7 @@ MANTXTS= newctime.3.txt newstrftime.3.txt newtzset.3.txt \
COMMON= calendars CONTRIBUTING LICENSE Makefile \
NEWS README SECURITY theory.html version
WEB_PAGES= tz-art.html tz-how-to.html tz-link.html
CHECK_WEB_PAGES=check_theory.html check_tz-art.html \
check_tz-how-to.html check_tz-link.html
CHECK_WEB_PAGES=theory.ck tz-art.ck tz-how-to.ck tz-link.ck
DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
PRIMARY_YDATA= africa antarctica asia australasia \
europe northamerica southamerica
@ -641,8 +652,7 @@ install: all $(DATA) $(REDO) $(MANS)
'$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
'$(DESTDIR)$(MANDIR)/man8'
$(ZIC_INSTALL) -l $(LOCALTIME) \
`case '$(POSIXRULES)' in ?*) echo '-p';; esac \
` $(POSIXRULES) \
-p $(POSIXRULES) \
-t '$(DESTDIR)$(TZDEFAULT)'
cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
cp tzselect '$(DESTDIR)$(BINDIR)/.'
@ -665,10 +675,10 @@ INSTALL: ALL install date.1
# and append "-dirty" if the contents do not already end in "-dirty".
version: $(VERSION_DEPS)
{ (type git) >/dev/null 2>&1 && \
V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
--abbrev=7 --dirty` || \
if test '$(VERSION)' = unknown && V=`cat $@`; then \
case $$V in *-dirty);; *) V=$$V-dirty;; esac; \
V=$$(git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
--abbrev=7 --dirty) || \
if test '$(VERSION)' = unknown && read -r V <$@; then \
V=$${V%-dirty}-dirty; \
else \
V='$(VERSION)'; \
fi; } && \
@ -678,7 +688,7 @@ version: $(VERSION_DEPS)
# These files can be tailored by setting BACKWARD, PACKRATDATA, PACKRATLIST.
vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
$(AWK) \
-v DATAFORM=`expr $@ : '\(.*\).zi'` \
-v DATAFORM=$(@:.zi=) \
-v PACKRATDATA='$(PACKRATDATA)' \
-v PACKRATLIST='$(PACKRATLIST)' \
-f ziguard.awk \
@ -687,7 +697,7 @@ vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
# This file has a version comment that attempts to capture any tailoring
# via BACKWARD, DATAFORM, PACKRATDATA, PACKRATLIST, and REDO.
tzdata.zi: $(DATAFORM).zi version zishrink.awk
version=`sed 1q version` && \
read -r version <version && \
LC_ALL=C $(AWK) \
-v dataform='$(DATAFORM)' \
-v deps='$(DSTDATA_ZI_DEPS) zishrink.awk' \
@ -708,7 +718,7 @@ tzdir.h:
mv $@.out $@
version.h: version
VERSION=`cat version` && printf '%s\n' \
read -r VERSION <version && printf '%s\n' \
'static char const PKGVERSION[]="($(PACKAGE)) ";' \
"static char const TZVERSION[]=\"$$VERSION\";" \
'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \
@ -748,12 +758,11 @@ commit-leap-seconds.list: fetch-leap-seconds.list
git commit --author="$$author" --date="$$date" -m'make $@' \
leap-seconds.list
# Arguments to pass to submakes of install_data.
# Arguments to pass to submakes.
# They can be overridden by later submake arguments.
INSTALLARGS = \
BACKWARD='$(BACKWARD)' \
DESTDIR='$(DESTDIR)' \
LEAPSECONDS='$(LEAPSECONDS)' \
PACKRATDATA='$(PACKRATDATA)' \
PACKRATLIST='$(PACKRATLIST)' \
TZDEFAULT='$(TZDEFAULT)' \
@ -762,16 +771,11 @@ INSTALLARGS = \
INSTALL_DATA_DEPS = zic leapseconds tzdata.zi
# 'make install_data' installs one set of TZif files.
install_data: $(INSTALL_DATA_DEPS)
posix_only: $(INSTALL_DATA_DEPS)
$(ZIC_INSTALL) tzdata.zi
posix_only: $(INSTALL_DATA_DEPS)
$(MAKE) $(INSTALLARGS) LEAPSECONDS= install_data
right_only: $(INSTALL_DATA_DEPS)
$(MAKE) $(INSTALLARGS) LEAPSECONDS='-L leapseconds' \
install_data
$(ZIC_INSTALL) -L leapseconds tzdata.zi
# In earlier versions of this makefile, the other two directories were
# subdirectories of $(TZDIR). However, this led to configuration errors.
@ -802,8 +806,7 @@ ZDS = dummy.zd
# Rule used only by submakes invoked by the $(TZS_NEW) rule.
# It is separate so that GNU 'make -j' can run instances in parallel.
$(ZDS): zdump
./zdump -i $(TZS_CUTOFF_FLAG) '$(wd)/'$$(expr $@ : '\(.*\).zd') \
>$@
./zdump -i $(TZS_CUTOFF_FLAG) "$$PWD/$(@:.zd=)" >$@
TZS_NEW_DEPS = tzdata.zi zdump zic
$(TZS_NEW): $(TZS_NEW_DEPS)
@ -812,20 +815,19 @@ $(TZS_NEW): $(TZS_NEW_DEPS)
$(zic) -d tzs$(TZS_YEAR).dir tzdata.zi
$(AWK) '/^L/{print "Link\t" $$2 "\t" $$3}' \
tzdata.zi | LC_ALL=C sort >$@.out
wd=`pwd` && \
x=`$(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \
x=$$($(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \
tzdata.zi \
| LC_ALL=C sort -t . -k 2,2` && \
| LC_ALL=C sort -t . -k 2,2) && \
set x $$x && \
shift && \
ZDS=$$* && \
$(MAKE) wd="$$wd" TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \
$(MAKE) TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \
ZDS="$$ZDS" $$ZDS && \
sed 's,^TZ=".*\.dir/,TZ=",' $$ZDS >>$@.out
rm -fr tzs$(TZS_YEAR).dir
mv $@.out $@
# If $(TZS) exists but 'make check_tzs' fails, a maintainer should inspect the
# If $(TZS) exists but 'make tzs.ck' fails, a maintainer should inspect the
# failed output and fix the inconsistency, perhaps by running 'make force_tzs'.
$(TZS):
touch $@
@ -842,7 +844,7 @@ date: $(DATEOBJS)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(DATEOBJS) $(LDLIBS)
tzselect: tzselect.ksh version
VERSION=`cat version` && sed \
read -r VERSION <version && sed \
-e "s'#!/bin/bash'#!"'$(KSHELL)'\' \
-e s\''\(AWK\)=[^}]*'\''\1=\'\''$(AWK)\'\'\' \
-e s\''\(PKGVERSION\)=.*'\''\1=\'\''($(PACKAGE)) \'\'\' \
@ -853,11 +855,11 @@ tzselect: tzselect.ksh version
chmod +x $@.out
mv $@.out $@
check: check_back check_mild
check_mild: check_character_set check_white_space check_links \
check_name_lengths check_now \
check_slashed_abbrs check_sorted \
check_tables check_web check_ziguard check_zishrink check_tzs
check: check_mild back.ck
check_mild: check_web check_zishrink \
character-set.ck white-space.ck links.ck mainguard.ck \
name-lengths.ck now.ck slashed-abbrs.ck sorted.ck \
tables.ck ziguard.ck tzs.ck
# True if UTF8_LOCALE does not work;
# otherwise, false but with LC_ALL set to $(UTF8_LOCALE).
@ -865,9 +867,9 @@ UTF8_LOCALE_MISSING = \
{ test ! '$(UTF8_LOCALE)' \
|| ! printf 'A\304\200B\n' \
| LC_ALL='$(UTF8_LOCALE)' grep -q '^A.B$$' >/dev/null 2>&1 \
|| { LC_ALL='$(UTF8_LOCALE)'; export LC_ALL; false; }; }
|| { export LC_ALL='$(UTF8_LOCALE)'; false; }; }
check_character_set: $(ENCHILADA)
character-set.ck: $(ENCHILADA)
$(UTF8_LOCALE_MISSING) || { \
sharp='#' && \
! grep -Env $(SAFE_LINE) $(MANS) date.1 $(MANTXTS) \
@ -882,48 +884,55 @@ check_character_set: $(ENCHILADA)
}
touch $@
check_white_space: $(ENCHILADA)
white-space.ck: $(ENCHILADA)
$(UTF8_LOCALE_MISSING) || { \
patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
enchilada='$(ENCHILADA)' && \
patfmt=' \t|[\f\r\v]' && pat=$$(printf "$$patfmt\\n") && \
! grep -En "$$pat|[$s]\$$" \
$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list); \
$${enchilada%leap-seconds.list*} \
$${enchilada#*leap-seconds.list}; \
}
touch $@
PRECEDES_FILE_NAME = ^(Zone|Link[$s]+[^$s]+)[$s]+
FILE_NAME_COMPONENT_TOO_LONG = $(PRECEDES_FILE_NAME)[^$s]*[^/$s]{15}
check_name_lengths: $(TDATA_TO_CHECK) backzone
! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
name-lengths.ck: $(TDATA_TO_CHECK) backzone
:;! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
$(TDATA_TO_CHECK) backzone
touch $@
mainguard.ck: main.zi
test '$(PACKRATLIST)' || \
cat $(TDATA) $(PACKRATDATA) | diff -u - main.zi
touch $@
PRECEDES_STDOFF = ^(Zone[$s]+[^$s]+)?[$s]+
STDOFF = [-+]?[0-9:.]+
RULELESS_SAVE = (-|$(STDOFF)[sd]?)
RULELESS_SLASHED_ABBRS = \
$(PRECEDES_STDOFF)$(STDOFF)[$s]+$(RULELESS_SAVE)[$s]+[^$s]*/
check_slashed_abbrs: $(TDATA_TO_CHECK)
! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK)
slashed-abbrs.ck: $(TDATA_TO_CHECK)
:;! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK)
touch $@
CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
check_sorted: backward backzone
sorted.ck: backward backzone
$(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} !/./ {g++}' \
backward | LC_ALL=C sort -cu
$(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
$(AWK) '/^Zone.*\// {print $$2}' backzone | LC_ALL=C sort -cu
touch $@
check_back: checklinks.awk $(TDATA_TO_CHECK)
back.ck: checklinks.awk $(TDATA_TO_CHECK)
$(AWK) \
-v DATAFORM=$(DATAFORM) \
-v backcheck=backward \
-f checklinks.awk $(TDATA_TO_CHECK)
touch $@
check_links: checklinks.awk tzdata.zi
links.ck: checklinks.awk tzdata.zi
$(AWK) \
-v DATAFORM=$(DATAFORM) \
-f checklinks.awk tzdata.zi
@ -932,26 +941,36 @@ check_links: checklinks.awk tzdata.zi
# Check timestamps from now through 28 years from now, to make sure
# that zonenow.tab contains all sequences of planned timestamps,
# without any duplicate sequences. In theory this might require
# 2800 years but that would take a long time to check.
CHECK_NOW_TIMESTAMP = `./date +%s`
# 2800+ years but that would take a long time to check.
CHECK_NOW_TIMESTAMP = $$(./date +%s)
CHECK_NOW_FUTURE_YEARS = 28
CHECK_NOW_FUTURE_SECS = $(CHECK_NOW_FUTURE_YEARS) '*' 366 '*' 24 '*' 60 '*' 60
check_now: checknow.awk date tzdata.zi zdump zic zone1970.tab zonenow.tab
rm -fr $@.dir
mkdir $@.dir
./zic -d $@.dir tzdata.zi
CHECK_NOW_FUTURE_SECS = $(CHECK_NOW_FUTURE_YEARS) * 366 * 24 * 60 * 60
now.ck: checknow.awk date tzdata.zi zdump zic zone1970.tab zonenow.tab
rm -fr $@d
mkdir $@d
./zic -d $@d tzdata.zi
now=$(CHECK_NOW_TIMESTAMP) && \
future=`expr $(CHECK_NOW_FUTURE_SECS) + $$now` && \
future=$$(($(CHECK_NOW_FUTURE_SECS) + $$now)) && \
./zdump -i -t $$now,$$future \
$$(find $$PWD/$@.dir/????*/ -type f) \
>$@.dir/zdump.tab
$$(find "$$PWD/$@d"/????*/ -type f) \
>$@d/zdump-now.tab && \
./zdump -i -t 0,$$future \
$$(find "$$PWD/$@d" -name Etc -prune \
-o -type f ! -name '*.tab' -print) \
>$@d/zdump-1970.tab
$(AWK) \
-v zdump_table=$@.dir/zdump.tab \
-v zdump_table=$@d/zdump-now.tab \
-f checknow.awk zonenow.tab
rm -fr $@.dir
$(AWK) \
'BEGIN {print "-\t-\tUTC"} /^Zone/ {print "-\t-\t" $$2}' \
$(PRIMARY_YDATA) backward factory | \
$(AWK) \
-v zdump_table=$@d/zdump-1970.tab \
-f checknow.awk
rm -fr $@d
touch $@
check_tables: checktab.awk $(YDATA) backward zone.tab zone1970.tab
tables.ck: checktab.awk $(YDATA) backward zone.tab zone1970.tab
for tab in $(ZONETABLES); do \
test "$$tab" = zone.tab && links='$(BACKWARD)' || links=''; \
$(AWK) -f checktab.awk -v zone_table=$$tab $(YDATA) $$links \
@ -959,26 +978,24 @@ check_tables: checktab.awk $(YDATA) backward zone.tab zone1970.tab
done
touch $@
check_tzs: $(TZS) $(TZS_NEW)
tzs.ck: $(TZS) $(TZS_NEW)
if test -s $(TZS); then \
$(DIFF_TZS) $(TZS) $(TZS_NEW); \
$(SETUP_DIFF_TZS) && $$DIFF_TZS $(TZS) $(TZS_NEW); \
else \
cp $(TZS_NEW) $(TZS); \
fi
touch $@
check_web: $(CHECK_WEB_PAGES)
check_theory.html: theory.html
check_tz-art.html: tz-art.html
check_tz-how-to.html: tz-how-to.html
check_tz-link.html: tz-link.html
check_theory.html check_tz-art.html check_tz-how-to.html check_tz-link.html:
$(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \
-F file=@$$(expr $@ : 'check_\(.*\)') -o $@.out && \
.SUFFIXES: .ck .html
.html.ck:
{ ! ($(CURL) --version) >/dev/null 2>&1 || \
$(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \
-F file=@$<; } >$@.out && \
test ! -s $@.out || { cat $@.out; exit 1; }
mv $@.out $@
check_ziguard: rearguard.zi vanguard.zi ziguard.awk
ziguard.ck: rearguard.zi vanguard.zi ziguard.awk
$(AWK) -v DATAFORM=rearguard -f ziguard.awk vanguard.zi | \
diff -u rearguard.zi -
$(AWK) -v DATAFORM=vanguard -f ziguard.awk rearguard.zi | \
@ -987,36 +1004,35 @@ check_ziguard: rearguard.zi vanguard.zi ziguard.awk
# Check that zishrink.awk does not alter the data, and that ziguard.awk
# preserves main-format data.
check_zishrink: check_zishrink_posix check_zishrink_right
check_zishrink_posix check_zishrink_right: \
check_zishrink: zishrink-posix.ck zishrink-right.ck
zishrink-posix.ck zishrink-right.ck: \
zic leapseconds $(PACKRATDATA) $(PACKRATLIST) \
$(TDATA) $(DATAFORM).zi tzdata.zi
rm -fr $@.dir $@-t.dir $@-shrunk.dir
mkdir $@.dir $@-t.dir $@-shrunk.dir
rm -fr $@d t-$@d shrunk-$@d
mkdir $@d t-$@d shrunk-$@d
case $@ in \
*_right) leap='-L leapseconds';; \
*right*) leap='-L leapseconds';; \
*) leap=;; \
esac && \
$(ZIC) $$leap -d $@.dir $(DATAFORM).zi && \
$(ZIC) $$leap -d $@-shrunk.dir tzdata.zi && \
$(ZIC) $$leap -d $@d $(DATAFORM).zi && \
$(ZIC) $$leap -d shrunk-$@d tzdata.zi && \
case $(DATAFORM),$(PACKRATLIST) in \
main,) \
$(ZIC) $$leap -d $@-t.dir $(TDATA) && \
$(ZIC) $$leap -d t-$@d $(TDATA) && \
$(AWK) '/^Rule/' $(TDATA) | \
$(ZIC) $$leap -d $@-t.dir - $(PACKRATDATA) && \
diff -r $@.dir $@-t.dir;; \
$(ZIC) $$leap -d t-$@d - $(PACKRATDATA) && \
diff -r $@d t-$@d;; \
esac
diff -r $@.dir $@-shrunk.dir
rm -fr $@.dir $@-t.dir $@-shrunk.dir
diff -r $@d shrunk-$@d
rm -fr $@d t-$@d shrunk-$@d
touch $@
clean_misc:
rm -fr check_*.dir typecheck_*.dir
rm -f *.o *.out $(TIME_T_ALTERNATIVES) \
check_* core typecheck_* \
rm -fr *.ckd *.dir
rm -f *.ck *.core *.o *.out core core.* \
date tzdir.h tzselect version.h zdump zic libtz.a
clean: clean_misc
rm -fr *.dir tzdb-*/
rm -fr tzdb-*/
rm -f *.zi $(TZS_NEW)
maintainer-clean: clean
@ -1027,7 +1043,7 @@ maintainer-clean: clean
names:
@echo $(ENCHILADA)
public: check check_public $(CHECK_TIME_T_ALTERNATIVES) \
public: check public.ck $(CHECK_TIME_T_ALTERNATIVES) \
tarballs signatures
date.1.txt: date.1
@ -1041,7 +1057,7 @@ zdump.8.txt: zdump.8
zic.8.txt: zic.8
$(MANTXTS): workman.sh
LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >$@.out
LC_ALL=C sh workman.sh $(@:.txt=) >$@.out
mv $@.out $@
# Set file timestamps deterministically if possible,
@ -1054,13 +1070,13 @@ SET_TIMESTAMP_N = sh -c '\
n=$$0 dest=$$1; shift; \
<"$$dest" && \
if test $$n != 0 && \
lsout=`ls -nt --time-style="+%s" "$$@" 2>/dev/null`; then \
lsout=$$(ls -nt --time-style="+%s" "$$@" 2>/dev/null); then \
set x $$lsout && \
timestamp=`expr $$7 + $$n` && \
timestamp=$$(($$7 + $$n)) && \
echo "+ touch -md @$$timestamp $$dest" && \
touch -md @$$timestamp "$$dest"; \
else \
newest=`ls -t "$$@" | sed 1q` && \
newest=$$(ls -t "$$@" | sed 1q) && \
echo "+ touch -mr $$newest $$dest" && \
touch -mr "$$newest" "$$dest"; \
fi'
@ -1083,15 +1099,15 @@ SET_TIMESTAMP_DEP = $(SET_TIMESTAMP_N) 1
set-timestamps.out: $(EIGHT_YARDS)
rm -f $@
if (type git) >/dev/null 2>&1 && \
files=`git ls-files $(EIGHT_YARDS)` && \
files=$$(git ls-files $(EIGHT_YARDS)) && \
touch -md @1 test.out; then \
rm -f test.out && \
for file in $$files; do \
if git diff --quiet $$file; then \
time=`TZ=UTC0 git log -1 \
time=$$(TZ=UTC0 git log -1 \
--format='tformat:%cd' \
--date='format:%Y-%m-%dT%H:%M:%SZ' \
$$file` && \
$$file) && \
echo "+ touch -md $$time $$file" && \
touch -md $$time $$file; \
else \
@ -1100,8 +1116,8 @@ set-timestamps.out: $(EIGHT_YARDS)
done; \
fi
$(SET_TIMESTAMP_DEP) leapseconds $(LEAP_DEPS)
for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \
$(SET_TIMESTAMP_DEP) $$file.txt $$file workman.sh || \
for file in $(MANTXTS); do \
$(SET_TIMESTAMP_DEP) $$file $${file%.txt} workman.sh || \
exit; \
done
$(SET_TIMESTAMP_DEP) version $(VERSION_DEPS)
@ -1114,30 +1130,29 @@ set-tzs-timestamp.out: $(TZS)
# The zics below ensure that each data file can stand on its own.
# We also do an all-files run to catch links to links.
check_public: $(VERSION_DEPS)
rm -fr public.dir
mkdir public.dir
ln $(VERSION_DEPS) public.dir
cd public.dir \
public.ck: $(VERSION_DEPS)
rm -fr $@d
mkdir $@d
ln $(VERSION_DEPS) $@d
cd $@d \
&& $(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' TZDIR='$(TZDIR)' ALL
for i in $(TDATA_TO_CHECK) public.dir/tzdata.zi \
public.dir/vanguard.zi public.dir/main.zi \
public.dir/rearguard.zi; \
for i in $(TDATA_TO_CHECK) \
tzdata.zi vanguard.zi main.zi rearguard.zi; \
do \
public.dir/zic -v -d public.dir/zoneinfo $$i 2>&1 || exit; \
$@d/zic -v -d $@d/zoneinfo $@d/$$i || exit; \
done
public.dir/zic -v -d public.dir/zoneinfo-all $(TDATA_TO_CHECK)
$@d/zic -v -d $@d/zoneinfo-all $(TDATA_TO_CHECK)
:
: Also check 'backzone' syntax.
rm public.dir/main.zi
cd public.dir && $(MAKE) PACKRATDATA=backzone main.zi
public.dir/zic -d public.dir/zoneinfo main.zi
rm public.dir/main.zi
cd public.dir && \
rm $@d/main.zi
cd $@d && $(MAKE) PACKRATDATA=backzone main.zi
$@d/zic -d $@d/zoneinfo main.zi
rm $@d/main.zi
cd $@d && \
$(MAKE) PACKRATDATA=backzone PACKRATLIST=zone.tab main.zi
public.dir/zic -d public.dir/zoneinfo main.zi
$@d/zic -d $@d/zoneinfo main.zi
:
rm -fr public.dir
rm -fr $@d
touch $@
# Check that the code works under various alternative
@ -1145,46 +1160,47 @@ check_public: $(VERSION_DEPS)
check_time_t_alternatives: $(TIME_T_ALTERNATIVES)
$(TIME_T_ALTERNATIVES_TAIL): $(TIME_T_ALTERNATIVES_HEAD)
$(TIME_T_ALTERNATIVES): $(VERSION_DEPS)
rm -fr $@.dir
mkdir $@.dir
ln $(VERSION_DEPS) $@.dir
rm -fr $@d
mkdir $@d
ln $(VERSION_DEPS) $@d
case $@ in \
int*32_t) range=-2147483648,2147483648;; \
*32_t*) range=-2147483648,2147483648;; \
u*) range=0,4294967296;; \
*) range=-4294967296,4294967296;; \
esac && \
wd=`pwd` && \
zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \
wd=$$PWD && \
zones=$$($(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab) && \
if test $@ = $(TIME_T_ALTERNATIVES_HEAD); then \
range_target=; \
else \
range_target=to$$range.tzs; \
fi && \
(cd $@.dir && \
$(MAKE) TOPDIR="$$wd/$@.dir" \
CFLAGS='$(CFLAGS) -Dtime_tz='"'$@'" \
(cd $@d && \
$(MAKE) TOPDIR="$$wd/$@d" \
CFLAGS='$(CFLAGS) -Dtime_tz='"'$(@:.ck=)'" \
REDO='$(REDO)' \
D=$$wd/$@.dir \
D="$$wd/$@d" \
TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \
install $$range_target) && \
test $@ = $(TIME_T_ALTERNATIVES_HEAD) || { \
(cd $(TIME_T_ALTERNATIVES_HEAD).dir && \
$(MAKE) TOPDIR="$$wd/$@.dir" \
(cd $(TIME_T_ALTERNATIVES_HEAD)d && \
$(MAKE) TOPDIR="$$wd/$@d" \
TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \
D=$$wd/$@.dir \
D="$$wd/$@d" \
to$$range.tzs) && \
$(DIFF_TZS) $(TIME_T_ALTERNATIVES_HEAD).dir/to$$range.tzs \
$@.dir/to$$range.tzs && \
$(SETUP_DIFF_TZS) && \
$$DIFF_TZS $(TIME_T_ALTERNATIVES_HEAD)d/to$$range.tzs \
$@d/to$$range.tzs && \
if diff -q Makefile Makefile 2>/dev/null; then \
quiet_option='-q'; \
else \
quiet_option=''; \
fi && \
diff $$quiet_option -r $(TIME_T_ALTERNATIVES_HEAD).dir/etc \
$@.dir/etc && \
diff $$quiet_option -r $(TIME_T_ALTERNATIVES_HEAD)d/etc \
$@d/etc && \
diff $$quiet_option -r \
$(TIME_T_ALTERNATIVES_HEAD).dir/usr/share \
$@.dir/usr/share; \
$(TIME_T_ALTERNATIVES_HEAD)d/usr/share \
$@d/usr/share; \
}
touch $@
@ -1199,7 +1215,7 @@ ALL_ASC = $(TRADITIONAL_ASC) $(REARGUARD_ASC) \
tarballs rearguard_tarballs tailored_tarballs traditional_tarballs \
signatures rearguard_signatures traditional_signatures: \
version set-timestamps.out rearguard.zi vanguard.zi
VERSION=`cat version` && \
read -r VERSION <version && \
$(MAKE) AWK='$(AWK)' VERSION="$$VERSION" $@_version
# These *_version rules are intended for use if VERSION is set by some
@ -1218,15 +1234,15 @@ rearguard_signatures_version: $(REARGUARD_ASC)
traditional_signatures_version: $(TRADITIONAL_ASC)
tzcode$(VERSION).tar.gz: set-timestamps.out
LC_ALL=C && export LC_ALL && \
tar $(TARFLAGS) -cf - \
$(SETUP_TAR) && \
$$TAR -cf - \
$(COMMON) $(DOCS) $(SOURCES) | \
gzip $(GZIPFLAGS) >$@.out
mv $@.out $@
tzdata$(VERSION).tar.gz: set-timestamps.out
LC_ALL=C && export LC_ALL && \
tar $(TARFLAGS) -cf - $(TZDATA_DIST) | \
$(SETUP_TAR) && \
$$TAR -cf - $(TZDATA_DIST) | \
gzip $(GZIPFLAGS) >$@.out
mv $@.out $@
@ -1251,9 +1267,9 @@ tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi set-timestamps.out
: The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier.
$(CREATE_EMPTY) $@.dir/pacificnew
touch -mr version $@.dir/version
LC_ALL=C && export LC_ALL && \
$(SETUP_TAR) && \
(cd $@.dir && \
tar $(TARFLAGS) -cf - \
$$TAR -cf - \
$(TZDATA_DIST) pacificnew | \
gzip $(GZIPFLAGS)) >$@.out
mv $@.out $@
@ -1269,9 +1285,14 @@ tzdata$(VERSION)-tailored.tar.gz: set-timestamps.out
rm -fr $@.dir
mkdir $@.dir
: The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier.
if test $(DATAFORM) = vanguard; then \
pacificnew=; \
else \
pacificnew=pacificnew; \
fi && \
cd $@.dir && \
$(CREATE_EMPTY) $(PRIMARY_YDATA) $(NDATA) backward \
`test $(DATAFORM) = vanguard || echo pacificnew`
$$pacificnew
(grep '^#' tzdata.zi && echo && cat $(DATAFORM).zi) \
>$@.dir/etcetera
touch -mr tzdata.zi $@.dir/etcetera
@ -1291,9 +1312,9 @@ tzdata$(VERSION)-tailored.tar.gz: set-timestamps.out
test -f $@.dir/$$file || links="$$links $$file"; \
done && \
ln $$links $@.dir
LC_ALL=C && export LC_ALL && \
$(SETUP_TAR) && \
(cd $@.dir && \
tar $(TARFLAGS) -cf - * | gzip $(GZIPFLAGS)) >$@.out
$$TAR -cf - * | gzip $(GZIPFLAGS)) >$@.out
mv $@.out $@
tzdb-$(VERSION).tar.lz: set-timestamps.out set-tzs-timestamp.out
@ -1301,8 +1322,8 @@ tzdb-$(VERSION).tar.lz: set-timestamps.out set-tzs-timestamp.out
mkdir tzdb-$(VERSION)
ln $(ENCHILADA) tzdb-$(VERSION)
$(SET_TIMESTAMP) tzdb-$(VERSION) tzdb-$(VERSION)/*
LC_ALL=C && export LC_ALL && \
tar $(TARFLAGS) -cf - tzdb-$(VERSION) | lzip -9 >$@.out
$(SETUP_TAR) && \
$$TAR -cf - tzdb-$(VERSION) | lzip -9 >$@.out
mv $@.out $@
tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz
@ -1313,22 +1334,21 @@ $(ALL_ASC):
$(GPG) --armor --detach-sign $?
TYPECHECK_CFLAGS = $(CFLAGS) -DTYPECHECK -D__time_t_defined -D_TIME_T
typecheck: typecheck_long_long typecheck_unsigned
typecheck_long_long typecheck_unsigned: $(VERSION_DEPS)
rm -fr $@.dir
mkdir $@.dir
ln $(VERSION_DEPS) $@.dir
cd $@.dir && \
typecheck: long-long.ck unsigned.ck
long-long.ck unsigned.ck: $(VERSION_DEPS)
rm -fr $@d
mkdir $@d
ln $(VERSION_DEPS) $@d
cd $@d && \
case $@ in \
*_long_long) i="long long";; \
*_unsigned ) i="unsigned" ;; \
long-long.*) i="long long";; \
unsigned.* ) i="unsigned" ;; \
esac && \
typecheck_cflags='' && \
$(MAKE) \
CFLAGS="$(TYPECHECK_CFLAGS) \"-Dtime_t=$$i\"" \
TOPDIR="`pwd`" \
TOPDIR="$$PWD" \
install
$@.dir/zdump -i -c 1970,1971 Europe/Rome
$@d/zdump -i -c 1970,1971 Europe/Rome
touch $@
zonenames: tzdata.zi
@ -1347,7 +1367,7 @@ zic.o: private.h tzfile.h tzdir.h version.h
.PHONY: check_web check_zishrink
.PHONY: clean clean_misc commit-leap-seconds.list dummy.zd
.PHONY: fetch-leap-seconds.list force_tzs
.PHONY: install install_data maintainer-clean names
.PHONY: install maintainer-clean names
.PHONY: posix_only posix_right public
.PHONY: rearguard_signatures rearguard_signatures_version
.PHONY: rearguard_tarballs rearguard_tarballs_version

124
contrib/tzdata/NEWS
View File

@ -1,5 +1,125 @@
News for the tz database
Release 2024b - 2024-09-04 12:27:47 -0700
Briefly:
Improve historical data for Mexico, Mongolia, and Portugal.
System V names are now obsolescent.
The main data form now uses %z.
The code now conforms to RFC 8536 for early timestamps.
Support POSIX.1-2024, which removes asctime_r and ctime_r.
Assume POSIX.2-1992 or later for shell scripts.
SUPPORT_C89 now defaults to 1.
Changes to past timestamps
Asia/Choibalsan is now an alias for Asia/Ulaanbaatar rather than
being a separate Zone with differing behavior before April 2008.
This seems better given our wildly conflicting information about
Mongolia's time zone history. (Thanks to Heitor David Pinto.)
Historical transitions for Mexico have been updated based on
official Mexican decrees. The affected timestamps occur during
the years 1921-1927, 1931, 1945, 1949-1970, and 1981-1997.
The affected zones are America/Bahia_Banderas, America/Cancun,
America/Chihuahua, America/Ciudad_Juarez, America/Hermosillo,
America/Mazatlan, America/Merida, America/Mexico_City,
America/Monterrey, America/Ojinaga, and America/Tijuana.
(Thanks to Heitor David Pinto.)
Historical transitions for Portugal, represented by Europe/Lisbon,
Atlantic/Azores, and Atlantic/Madeira, have been updated based on a
close reading of old Portuguese legislation, replacing previous data
mainly originating from Whitman and Shanks & Pottenger. These
changes affect a few transitions in 1917-1921, 1924, and 1940
throughout these regions by a few hours or days, and various
timestamps between 1977 and 1993 depending on the region. In
particular, the Azores and Madeira did not observe DST from 1977 to
1981. Additionally, the adoption of standard zonal time in former
Portuguese colonies have been adjusted: Africa/Maputo in 1909, and
Asia/Dili by 22 minutes at the start of 1912.
(Thanks to Tim Parenti.)
Changes to past tm_isdst flags
The period from 1966-04-03 through 1966-10-02 in Portugal is now
modeled as DST, to more closely reflect how contemporaneous changes
in law entered into force.
Changes to data
Names present only for compatibility with UNIX System V
(last released in the 1990s) have been moved to 'backward'.
These names, which for post-1970 timestamps mostly just duplicate
data of geographical names, were confusing downstream uses.
Names moved to 'backward' are now links to geographical names.
This affects behavior for TZ='EET' for some pre-1981 timestamps,
for TZ='CET' for some pre-1947 timestamps, and for TZ='WET' for
some pre-1996 timestamps. Also, TZ='MET' now behaves like
TZ='CET' and so uses the abbreviation "CET" rather than "MET".
Those needing the previous TZDB behavior, which does not match any
real-world clocks, can find the old entries in 'backzone'.
(Problem reported by Justin Grant.)
The main source files' time zone abbreviations now use %z,
supported by zic since release 2015f and used in vanguard form
since release 2022b. For example, America/Sao_Paulo now contains
the zone continuation line "-3:00 Brazil %z", which is less error
prone than the old "-3:00 Brazil -03/-02". This does not change
the represented data: the generated TZif files are unchanged.
Rearguard form still avoids %z, to support obsolescent parsers.
Asia/Almaty has been removed from zonenow.tab as it now agrees
with Asia/Tashkent for future timestamps, due to Kazakhstan's
2024-02-29 time zone change. Similarly, America/Scoresbysund
has been removed, as it now agrees with America/Nuuk due to
its 2024-03-31 time zone change.
Changes to code
localtime.c now always uses a TZif file's time type 0 to handle
timestamps before the file's first transition. Formerly,
localtime.c sometimes inferred a different time type, in order to
handle problematic data generated by zic 2018e or earlier. As it
is now safe to assume more recent versions of zic, there is no
longer a pressing need to fail to conform RFC 8536 section 3.2,
which requires using time type 0 in this situation. This change
does not affect behavior when reading TZif files generated by zic
2018f and later.
POSIX.1-2024 removes asctime_r and ctime_r and does not let
libraries define them, so remove them except when needed to
conform to earlier POSIX. These functions are dangerous as they
can overrun user buffers. If you still need them, add
-DSUPPORT_POSIX2008 to CFLAGS.
The SUPPORT_C89 option now defaults to 1 instead of 0, fixing a
POSIX-conformance bug introduced in 2023a.
tzselect now supports POSIX.1-2024 proleptic TZ strings. Also, it
assumes POSIX.2-1992 or later, as practical porting targets now
all support that, and it uses some features from POSIX.1-2024 if
available.
Changes to build procedure
'make check' no longer requires curl and Internet access.
The build procedure now assumes POSIX.2-1992 or later, to simplify
maintenance. To build on Solaris 10, the only extant system still
defaulting to pre-POSIX, prepend /usr/xpg4/bin to PATH.
Changes to documentation
The documentation now reflects POSIX.1-2024.
Changes to commentary
Commentary about historical transitions in Portugal and her former
colonies has been expanded with links to many relevant legislation.
(Thanks to Tim Parenti.)
Release 2024a - 2024-02-01 09:28:56 -0800
Briefly:
@ -161,7 +281,7 @@ Release 2023d - 2023-12-21 20:02:24 -0800
* It uses the special .POSIX target.
* It quotes special characters more carefully.
* It no longer mishandles builds in an ISO 8859 locale.
Due to the CC changes, TZDIR is now #defined in a file tzfile.h
Due to the CC changes, TZDIR is now #defined in a file tzdir.h
built by 'make', not in a $(CC) -D option. Also, TZDEFAULT is
now treated like TZDIR as they have similar roles.
@ -283,7 +403,7 @@ Release 2023a - 2023-03-22 12:39:33 -0700
To improve tzselect diagnostics, zone1970.tab's comments column is
now limited to countries that have multiple timezones.
Note that leap seconds are planned to be discontinued by 2035.
Note that there are plans to discontinue leap seconds by 2035.
Release 2022g - 2022-11-29 08:58:31 -0800

73
contrib/tzdata/africa
View File

@ -103,17 +103,16 @@ Zone Africa/Algiers 0:12:12 - LMT 1891 Mar 16
# Cape Verde / Cabo Verde
#
# From Paul Eggert (2018-02-16):
# Shanks gives 1907 for the transition to +02.
# For now, ignore that and follow the 1911-05-26 Portuguese decree
# (see Europe/Lisbon).
# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
# For timestamps before independence, see commentary for Europe/Lisbon.
# Shanks gives 1907 instead for the transition to -02.
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Atlantic/Cape_Verde -1:34:04 - LMT 1912 Jan 01 2:00u # Praia
-2:00 - -02 1942 Sep
-2:00 1:00 -01 1945 Oct 15
-2:00 - -02 1975 Nov 25 2:00
-1:00 - -01
-2:00 - %z 1942 Sep
-2:00 1:00 %z 1945 Oct 15
-2:00 - %z 1975 Nov 25 2:00
-1:00 - %z
# Chad
# Zone NAME STDOFF RULES FORMAT [UNTIL]
@ -345,14 +344,12 @@ Zone Africa/Cairo 2:05:09 - LMT 1900 Oct
# Guinea-Bissau
#
# From Paul Eggert (2018-02-16):
# Shanks gives 1911-05-26 for the transition to WAT,
# evidently confusing the date of the Portuguese decree
# (see Europe/Lisbon) with the date that it took effect.
# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
# For timestamps before independence, see commentary for Europe/Lisbon.
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1 1:00u
-1:00 - -01 1975
-1:00 - %z 1975
0:00 - GMT
# Comoros
@ -417,10 +414,10 @@ Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1 1:00u
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Nairobi 2:27:16 - LMT 1908 May
2:30 - +0230 1928 Jun 30 24:00
2:30 - %z 1928 Jun 30 24:00
3:00 - EAT 1930 Jan 4 24:00
2:30 - +0230 1936 Dec 31 24:00
2:45 - +0245 1942 Jul 31 24:00
2:30 - %z 1936 Dec 31 24:00
2:45 - %z 1942 Jul 31 24:00
3:00 - EAT
# Liberia
@ -591,7 +588,7 @@ Rule Mauritius 2008 only - Oct lastSun 2:00 1:00 -
Rule Mauritius 2009 only - Mar lastSun 2:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
4:00 Mauritius +04/+05
4:00 Mauritius %z
# Agalega Is, Rodriguez
# no information; probably like Indian/Mauritius
@ -1071,10 +1068,10 @@ Rule Morocco 2087 only - May 11 2:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26
0:00 Morocco +00/+01 1984 Mar 16
1:00 - +01 1986
0:00 Morocco +00/+01 2018 Oct 28 3:00
1:00 Morocco +01/+00
0:00 Morocco %z 1984 Mar 16
1:00 - %z 1986
0:00 Morocco %z 2018 Oct 28 3:00
1:00 Morocco %z
# Western Sahara
#
@ -1088,9 +1085,9 @@ Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26
# since most of it was then controlled by Morocco.
Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún
-1:00 - -01 1976 Apr 14
0:00 Morocco +00/+01 2018 Oct 28 3:00
1:00 Morocco +01/+00
-1:00 - %z 1976 Apr 14
0:00 Morocco %z 2018 Oct 28 3:00
1:00 Morocco %z
# Botswana
# Burundi
@ -1101,13 +1098,27 @@ Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún
# Zambia
# Zimbabwe
#
# Shanks gives 1903-03-01 for the transition to CAT.
# Perhaps the 1911-05-26 Portuguese decree
# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# merely made it official?
# From Tim Parenti (2024-07-01):
# For timestamps before Mozambique's independence, see commentary for
# Europe/Lisbon.
#
# From Paul Eggert (2024-05-24):
# The London Gazette, 1903-04-03, page 2245, says that
# as of 1903-03-03 a time ball at the port of Lourenço Marques
# (as Maputo was then called) was dropped daily at 13:00:00 LMT,
# corresponding to 22:49:41.7 GMT, so local time was +02:10:18.3.
# Conversely, the newspaper South Africa, 1909-02-09, page 321,
# says the port had just installed an apparatus that communicated
# "from the controlling clock in the new Observatory at Reuben Point ...
# exact mean South African time, i.e., 30 deg., or 2 hours East of Greenwich".
# Although Shanks gives 1903-03-01 for the transition to CAT,
# evidently the port transitioned to CAT after 1903-03-03 but before
# the Portuguese legal transition of 1912-01-01 (see Europe/Lisbon commentary).
# For lack of better info, list 1909 as the transition date.
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Maputo 2:10:20 - LMT 1903 Mar
#STDOFF 2:10:18.3
Zone Africa/Maputo 2:10:18 - LMT 1909
2:00 - CAT
# Namibia
@ -1172,7 +1183,7 @@ Rule Namibia 1995 2017 - Apr Sun>=1 2:00 -1:00 WAT
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8
1:30 - +0130 1903 Mar
1:30 - %z 1903 Mar
2:00 - SAST 1942 Sep 20 2:00
2:00 1:00 SAST 1943 Mar 21 2:00
2:00 - SAST 1990 Mar 21 # independence
@ -1260,7 +1271,7 @@ Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8
Zone Africa/Lagos 0:13:35 - LMT 1905 Jul 1
0:00 - GMT 1908 Jul 1
0:13:35 - LMT 1914 Jan 1
0:30 - +0030 1919 Sep 1
0:30 - %z 1919 Sep 1
1:00 - WAT
# São Tomé and Príncipe

58
contrib/tzdata/antarctica
View File

@ -87,34 +87,34 @@
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Casey 0 - -00 1969
8:00 - +08 2009 Oct 18 2:00
11:00 - +11 2010 Mar 5 2:00
8:00 - +08 2011 Oct 28 2:00
11:00 - +11 2012 Feb 21 17:00u
8:00 - +08 2016 Oct 22
11:00 - +11 2018 Mar 11 4:00
8:00 - +08 2018 Oct 7 4:00
11:00 - +11 2019 Mar 17 3:00
8:00 - +08 2019 Oct 4 3:00
11:00 - +11 2020 Mar 8 3:00
8:00 - +08 2020 Oct 4 0:01
11:00 - +11 2021 Mar 14 0:00
8:00 - +08 2021 Oct 3 0:01
11:00 - +11 2022 Mar 13 0:00
8:00 - +08 2022 Oct 2 0:01
11:00 - +11 2023 Mar 9 3:00
8:00 - +08
8:00 - %z 2009 Oct 18 2:00
11:00 - %z 2010 Mar 5 2:00
8:00 - %z 2011 Oct 28 2:00
11:00 - %z 2012 Feb 21 17:00u
8:00 - %z 2016 Oct 22
11:00 - %z 2018 Mar 11 4:00
8:00 - %z 2018 Oct 7 4:00
11:00 - %z 2019 Mar 17 3:00
8:00 - %z 2019 Oct 4 3:00
11:00 - %z 2020 Mar 8 3:00
8:00 - %z 2020 Oct 4 0:01
11:00 - %z 2021 Mar 14 0:00
8:00 - %z 2021 Oct 3 0:01
11:00 - %z 2022 Mar 13 0:00
8:00 - %z 2022 Oct 2 0:01
11:00 - %z 2023 Mar 9 3:00
8:00 - %z
Zone Antarctica/Davis 0 - -00 1957 Jan 13
7:00 - +07 1964 Nov
7:00 - %z 1964 Nov
0 - -00 1969 Feb
7:00 - +07 2009 Oct 18 2:00
5:00 - +05 2010 Mar 10 20:00u
7:00 - +07 2011 Oct 28 2:00
5:00 - +05 2012 Feb 21 20:00u
7:00 - +07
7:00 - %z 2009 Oct 18 2:00
5:00 - %z 2010 Mar 10 20:00u
7:00 - %z 2011 Oct 28 2:00
5:00 - %z 2012 Feb 21 20:00u
7:00 - %z
Zone Antarctica/Mawson 0 - -00 1954 Feb 13
6:00 - +06 2009 Oct 18 2:00
5:00 - +05
6:00 - %z 2009 Oct 18 2:00
5:00 - %z
# References:
# Casey Weather (1998-02-26)
# http://www.antdiv.gov.au/aad/exop/sfo/casey/casey_aws.html
@ -290,10 +290,10 @@ Zone Antarctica/Troll 0 - -00 2005 Feb 12
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Vostok 0 - -00 1957 Dec 16
7:00 - +07 1994 Feb
7:00 - %z 1994 Feb
0 - -00 1994 Nov
7:00 - +07 2023 Dec 18 2:00
5:00 - +05
7:00 - %z 2023 Dec 18 2:00
5:00 - %z
# S Africa - year-round bases
# Marion Island, -4653+03752
@ -326,7 +326,7 @@ Zone Antarctica/Vostok 0 - -00 1957 Dec 16
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Rothera 0 - -00 1976 Dec 1
-3:00 - -03
-3:00 - %z
# Uruguay - year round base
# Artigas, King George Island, -621104-0585107

442
contrib/tzdata/asia
View File

@ -83,8 +83,8 @@ Rule RussiaAsia 1996 2010 - Oct lastSun 2:00s 0 -
# Afghanistan
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Kabul 4:36:48 - LMT 1890
4:00 - +04 1945
4:30 - +0430
4:00 - %z 1945
4:30 - %z
# Armenia
# From Paul Eggert (2006-03-22):
@ -116,12 +116,12 @@ Rule Armenia 2011 only - Mar lastSun 2:00s 1:00 -
Rule Armenia 2011 only - Oct lastSun 2:00s 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2
3:00 - +03 1957 Mar
4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
3:00 RussiaAsia +03/+04 1995 Sep 24 2:00s
4:00 - +04 1997
4:00 RussiaAsia +04/+05 2011
4:00 Armenia +04/+05
3:00 - %z 1957 Mar
4:00 RussiaAsia %z 1991 Mar 31 2:00s
3:00 RussiaAsia %z 1995 Sep 24 2:00s
4:00 - %z 1997
4:00 RussiaAsia %z 2011
4:00 Armenia %z
# Azerbaijan
@ -142,12 +142,12 @@ Rule Azer 1997 2015 - Mar lastSun 4:00 1:00 -
Rule Azer 1997 2015 - Oct lastSun 5:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Baku 3:19:24 - LMT 1924 May 2
3:00 - +03 1957 Mar
4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
3:00 RussiaAsia +03/+04 1992 Sep lastSun 2:00s
4:00 - +04 1996
4:00 EUAsia +04/+05 1997
4:00 Azer +04/+05
3:00 - %z 1957 Mar
4:00 RussiaAsia %z 1991 Mar 31 2:00s
3:00 RussiaAsia %z 1992 Sep lastSun 2:00s
4:00 - %z 1996
4:00 EUAsia %z 1997
4:00 Azer %z
# Bangladesh
# From Alexander Krivenyshev (2009-05-13):
@ -228,17 +228,17 @@ Rule Dhaka 2009 only - Dec 31 24:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Dhaka 6:01:40 - LMT 1890
5:53:20 - HMT 1941 Oct # Howrah Mean Time?
6:30 - +0630 1942 May 15
5:30 - +0530 1942 Sep
6:30 - +0630 1951 Sep 30
6:00 - +06 2009
6:00 Dhaka +06/+07
6:30 - %z 1942 May 15
5:30 - %z 1942 Sep
6:30 - %z 1951 Sep 30
6:00 - %z 2009
6:00 Dhaka %z
# Bhutan
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu
5:30 - +0530 1987 Oct
6:00 - +06
5:30 - %z 1987 Oct
6:00 - %z
# British Indian Ocean Territory
# Whitman and the 1995 CIA time zone map say 5:00, but the
@ -248,8 +248,8 @@ Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu
# then contained the Chagos Archipelago).
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Indian/Chagos 4:49:40 - LMT 1907
5:00 - +05 1996
6:00 - +06
5:00 - %z 1996
6:00 - %z
# Cocos (Keeling) Islands
# Myanmar (Burma)
@ -265,9 +265,9 @@ Zone Indian/Chagos 4:49:40 - LMT 1907
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Yangon 6:24:47 - LMT 1880 # or Rangoon
6:24:47 - RMT 1920 # Rangoon local time
6:30 - +0630 1942 May
9:00 - +09 1945 May 3
6:30 - +0630
6:30 - %z 1942 May
9:00 - %z 1945 May 3
6:30 - %z
# China
@ -656,7 +656,7 @@ Zone Asia/Shanghai 8:05:43 - LMT 1901
# Xinjiang time, used by many in western China; represented by Ürümqi / Ürümchi
# / Wulumuqi. (Please use Asia/Shanghai if you prefer Beijing time.)
Zone Asia/Urumqi 5:50:20 - LMT 1928
6:00 - +06
6:00 - %z
# Hong Kong
@ -1114,7 +1114,7 @@ Rule Macau 1979 only - Oct Sun>=16 03:30 0 S
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Macau 7:34:10 - LMT 1904 Oct 30
8:00 - CST 1941 Dec 21 23:00
9:00 Macau +09/+10 1945 Sep 30 24:00
9:00 Macau %z 1945 Sep 30 24:00
8:00 Macau C%sT
@ -1157,7 +1157,7 @@ Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14
Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14
2:00 Cyprus EE%sT 1998 Sep
2:00 EUAsia EE%sT 2016 Sep 8
3:00 - +03 2017 Oct 29 1:00u
3:00 - %z 2017 Oct 29 1:00u
2:00 EUAsia EE%sT
# Georgia
@ -1198,18 +1198,25 @@ Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Tbilisi 2:59:11 - LMT 1880
2:59:11 - TBMT 1924 May 2 # Tbilisi Mean Time
3:00 - +03 1957 Mar
4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
3:00 RussiaAsia +03/+04 1992
3:00 E-EurAsia +03/+04 1994 Sep lastSun
4:00 E-EurAsia +04/+05 1996 Oct lastSun
4:00 1:00 +05 1997 Mar lastSun
4:00 E-EurAsia +04/+05 2004 Jun 27
3:00 RussiaAsia +03/+04 2005 Mar lastSun 2:00
4:00 - +04
3:00 - %z 1957 Mar
4:00 RussiaAsia %z 1991 Mar 31 2:00s
3:00 RussiaAsia %z 1992
3:00 E-EurAsia %z 1994 Sep lastSun
4:00 E-EurAsia %z 1996 Oct lastSun
4:00 1:00 %z 1997 Mar lastSun
4:00 E-EurAsia %z 2004 Jun 27
3:00 RussiaAsia %z 2005 Mar lastSun 2:00
4:00 - %z
# East Timor
# From Tim Parenti (2024-07-01):
# The 1912-01-01 transition occurred at 00:00 new time, per the 1911-05-24
# Portuguese decree (see Europe/Lisbon). A provision in article 5(c) of the
# decree prescribed that Timor "will keep counting time in harmony with
# neighboring foreign colonies, [for] as long as they do not adopt the time
# that belongs to them in [the Washington Convention] system."
# See Indonesia for the 1945 transition.
# From João Carrascalão, brother of the former governor of East Timor, in
@ -1233,11 +1240,11 @@ Zone Asia/Tbilisi 2:59:11 - LMT 1880
# midnight on Saturday, September 16.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1
8:00 - +08 1942 Feb 21 23:00
9:00 - +09 1976 May 3
8:00 - +08 2000 Sep 17 0:00
9:00 - +09
Zone Asia/Dili 8:22:20 - LMT 1911 Dec 31 16:00u
8:00 - %z 1942 Feb 21 23:00
9:00 - %z 1976 May 3
8:00 - %z 2000 Sep 17 0:00
9:00 - %z
# India
@ -1303,9 +1310,9 @@ Zone Asia/Kolkata 5:53:28 - LMT 1854 Jun 28 # Kolkata
5:53:20 - HMT 1870 # Howrah Mean Time?
5:21:10 - MMT 1906 Jan 1 # Madras local time
5:30 - IST 1941 Oct
5:30 1:00 +0630 1942 May 15
5:30 1:00 %z 1942 May 15
5:30 - IST 1942 Sep
5:30 1:00 +0630 1945 Oct 15
5:30 1:00 %z 1945 Oct 15
5:30 - IST
# Since 1970 the following are like Asia/Kolkata:
# Andaman Is
@ -1357,33 +1364,33 @@ Zone Asia/Jakarta 7:07:12 - LMT 1867 Aug 10
# Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13,
# but this must be a typo.
7:07:12 - BMT 1923 Dec 31 16:40u # Batavia
7:20 - +0720 1932 Nov
7:30 - +0730 1942 Mar 23
9:00 - +09 1945 Sep 23
7:30 - +0730 1948 May
8:00 - +08 1950 May
7:30 - +0730 1964
7:20 - %z 1932 Nov
7:30 - %z 1942 Mar 23
9:00 - %z 1945 Sep 23
7:30 - %z 1948 May
8:00 - %z 1950 May
7:30 - %z 1964
7:00 - WIB
# west and central Borneo
Zone Asia/Pontianak 7:17:20 - LMT 1908 May
7:17:20 - PMT 1932 Nov # Pontianak MT
7:30 - +0730 1942 Jan 29
9:00 - +09 1945 Sep 23
7:30 - +0730 1948 May
8:00 - +08 1950 May
7:30 - +0730 1964
7:30 - %z 1942 Jan 29
9:00 - %z 1945 Sep 23
7:30 - %z 1948 May
8:00 - %z 1950 May
7:30 - %z 1964
8:00 - WITA 1988 Jan 1
7:00 - WIB
# Sulawesi, Lesser Sundas, east and south Borneo
Zone Asia/Makassar 7:57:36 - LMT 1920
7:57:36 - MMT 1932 Nov # Macassar MT
8:00 - +08 1942 Feb 9
9:00 - +09 1945 Sep 23
8:00 - %z 1942 Feb 9
9:00 - %z 1945 Sep 23
8:00 - WITA
# Maluku Islands, West Papua, Papua
Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov
9:00 - +09 1944 Sep 1
9:30 - +0930 1964
9:00 - %z 1944 Sep 1
9:30 - %z 1964
9:00 - WIT
# Iran
@ -1619,9 +1626,9 @@ Rule Iran 2021 2022 - Sep 21 24:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:25:44 - TMT 1935 Jun 13 # Tehran Mean Time
3:30 Iran +0330/+0430 1977 Oct 20 24:00
4:00 Iran +04/+05 1979
3:30 Iran +0330/+0430
3:30 Iran %z 1977 Oct 20 24:00
4:00 Iran %z 1979
3:30 Iran %z
# Iraq
@ -1664,8 +1671,8 @@ Rule Iraq 1991 2007 - Oct 1 3:00s 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Baghdad 2:57:40 - LMT 1890
2:57:36 - BMT 1918 # Baghdad Mean Time?
3:00 - +03 1982 May
3:00 Iraq +03/+04
3:00 - %z 1982 May
3:00 Iraq %z
###############################################################################
@ -2262,7 +2269,7 @@ Rule Jordan 2022 only - Feb lastThu 24:00 1:00 S
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Amman 2:23:44 - LMT 1931
2:00 Jordan EE%sT 2022 Oct 28 0:00s
3:00 - +03
3:00 - %z
# Kazakhstan
@ -2473,88 +2480,88 @@ Zone Asia/Amman 2:23:44 - LMT 1931
# Almaty (formerly Alma-Ata), representing most locations in Kazakhstan
# This includes Abai/Abay (ISO 3166-2 code KZ-10), Aqmola/Akmola (KZ-11),
# Almaty (KZ-19), Almaty city (KZ-75), Astana city (KZ-71),
# East Kazkhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33),
# East Kazakhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33),
# Karaganda (KZ-35), North Kazakhstan (KZ-59), Pavlodar (KZ-55),
# Shyumkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62).
# Shymkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62).
Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata
5:00 - +05 1930 Jun 21
6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s
6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s
6:00 - +06 2024 Mar 1 0:00
5:00 - +05
5:00 - %z 1930 Jun 21
6:00 RussiaAsia %z 1991 Mar 31 2:00s
5:00 RussiaAsia %z 1992 Jan 19 2:00s
6:00 RussiaAsia %z 2004 Oct 31 2:00s
6:00 - %z 2024 Mar 1 0:00
5:00 - %z
# Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-43)
Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
4:00 RussiaAsia +04/+05 1991 Sep 29 2:00s
5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s
6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s
5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
6:00 - +06 2018 Dec 21 0:00
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 - %z 1981 Apr 1
5:00 1:00 %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1991 Mar 31 2:00s
4:00 RussiaAsia %z 1991 Sep 29 2:00s
5:00 RussiaAsia %z 1992 Jan 19 2:00s
6:00 RussiaAsia %z 1992 Mar 29 2:00s
5:00 RussiaAsia %z 2004 Oct 31 2:00s
6:00 - %z 2018 Dec 21 0:00
5:00 - %z
# Qostanay (aka Kostanay, Kustanay) (KZ-39)
# The 1991/2 rules are unclear partly because of the 1997 Turgai
# reorganization.
Zone Asia/Qostanay 4:14:28 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
6:00 - +06 2024 Mar 1 0:00
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 - %z 1981 Apr 1
5:00 1:00 %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1991 Mar 31 2:00s
4:00 RussiaAsia %z 1992 Jan 19 2:00s
5:00 RussiaAsia %z 2004 Oct 31 2:00s
6:00 - %z 2024 Mar 1 0:00
5:00 - %z
# Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-15)
Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 - %z 1981 Apr 1
5:00 1:00 %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1991 Mar 31 2:00s
4:00 RussiaAsia %z 1992 Jan 19 2:00s
5:00 RussiaAsia %z 2004 Oct 31 2:00s
5:00 - %z
# Mangghystaū (KZ-47)
# Aqtau was not founded until 1963, but it represents an inhabited region,
# so include timestamps before 1963.
Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 1994 Sep 25 2:00s
4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 - %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1991 Mar 31 2:00s
4:00 RussiaAsia %z 1992 Jan 19 2:00s
5:00 RussiaAsia %z 1994 Sep 25 2:00s
4:00 RussiaAsia %z 2004 Oct 31 2:00s
5:00 - %z
# Atyraū (KZ-23) is like Mangghystaū except it switched from
# +04/+05 to +05/+06 in spring 1999, not fall 1994.
Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2
3:00 - +03 1930 Jun 21
5:00 - +05 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 1999 Mar 28 2:00s
4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
5:00 - +05
3:00 - %z 1930 Jun 21
5:00 - %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1991 Mar 31 2:00s
4:00 RussiaAsia %z 1992 Jan 19 2:00s
5:00 RussiaAsia %z 1999 Mar 28 2:00s
4:00 RussiaAsia %z 2004 Oct 31 2:00s
5:00 - %z
# West Kazakhstan (KZ-27)
# From Paul Eggert (2016-03-18):
# The 1989 transition is from USSR act No. 227 (1989-03-14).
Zone Asia/Oral 3:25:24 - LMT 1924 May 2 # or Ural'sk
3:00 - +03 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1989 Mar 26 2:00s
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
5:00 RussiaAsia +05/+06 1992 Mar 29 2:00s
4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
5:00 - +05
3:00 - %z 1930 Jun 21
5:00 - %z 1981 Apr 1
5:00 1:00 %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1989 Mar 26 2:00s
4:00 RussiaAsia %z 1992 Jan 19 2:00s
5:00 RussiaAsia %z 1992 Mar 29 2:00s
4:00 RussiaAsia %z 2004 Oct 31 2:00s
5:00 - %z
# Kyrgyzstan (Kirgizstan)
# Transitions through 1991 are from Shanks & Pottenger.
@ -2575,11 +2582,11 @@ Rule Kyrgyz 1997 2005 - Mar lastSun 2:30 1:00 -
Rule Kyrgyz 1997 2004 - Oct lastSun 2:30 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2
5:00 - +05 1930 Jun 21
6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
5:00 RussiaAsia +05/+06 1991 Aug 31 2:00
5:00 Kyrgyz +05/+06 2005 Aug 12
6:00 - +06
5:00 - %z 1930 Jun 21
6:00 RussiaAsia %z 1991 Mar 31 2:00s
5:00 RussiaAsia %z 1991 Aug 31 2:00
5:00 Kyrgyz %z 2005 Aug 12
6:00 - %z
###############################################################################
@ -2786,16 +2793,16 @@ Rule NBorneo 1935 1941 - Dec 14 0:00 0 -
# and 1982 transition dates are from Mok Ly Yng.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Kuching 7:21:20 - LMT 1926 Mar
7:30 - +0730 1933
8:00 NBorneo +08/+0820 1942 Feb 16
9:00 - +09 1945 Sep 12
8:00 - +08
7:30 - %z 1933
8:00 NBorneo %z 1942 Feb 16
9:00 - %z 1945 Sep 12
8:00 - %z
# Maldives
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Indian/Maldives 4:54:00 - LMT 1880 # Malé
4:54:00 - MMT 1960 # Malé Mean Time
5:00 - +05
5:00 - %z
# Mongolia
@ -2897,9 +2904,37 @@ Zone Indian/Maldives 4:54:00 - LMT 1880 # Malé
# From Arthur David Olson (2008-05-19):
# Assume that Choibalsan is indeed offset by 8:00.
# XXX--in the absence of better information, assume that transition
# was at the start of 2008-03-31 (the day of Steffen Thorsen's report);
# this is almost surely wrong.
# From Heitor David Pinto (2024-06-23):
# Sources about time zones in Mongolia seem to list one of two conflicting
# configurations. The first configuration, mentioned in a comment to the TZ
# database in 1999, citing a Mongolian government website, lists the provinces
# of Bayan-Ölgii, Khovd and Uvs in UTC+7, and the rest of the country in
# UTC+8. The second configuration, mentioned in a comment to the database in
# 2001, lists Bayan-Ölgii, Khovd, Uvs, Govi-Altai and Zavkhan in UTC+7, Dornod
# and Sükhbaatar in UTC+9, and the rest of the country in UTC+8.
#
# The first configuration is still mentioned by several Mongolian travel
# agencies:
# https://www.adventurerider.mn/en/page/about_mongolia
# http://www.naturetours.mn/nt/mongolia.php
# https://www.newjuulchin.mn/web/content/7506?unique=fa24a0f6e96e022a3578ee5195ac879638c734ce
#
# It also matches these flight schedules in 2013:
# http://web.archive.org/web/20130722023600/https://www.hunnuair.com/en/timetabled
# The flight times imply that the airports of Uliastai (Zavkhan), Choibalsan
# (Dornod) and Altai (Govi-Altai) are in the same time zone as Ulaanbaatar,
# and Khovd is one hour behind....
#
# The second configuration was mentioned by an official of the Mongolian
# standards agency in an interview in 2014: https://ikon.mn/n/9v6
# And it's still listed by the Mongolian aviation agency:
# https://ais.mn/files/aip/eAIP/2023-12-25/html/eSUP/ZM-eSUP-23-04-en-MN.html
#
# ... I believe that the first configuration is what is actually observed in
# Mongolia and has been so all along, at least since 1999. The second
# configuration closely matches the ideal time zone boundaries at 97.5° E and
# 112.5° E but it doesn't seem to be used in practice.
# From Ganbold Tsagaankhuu (2015-03-10):
# It seems like yesterday Mongolian Government meeting has concluded to use
@ -2938,25 +2973,18 @@ Rule Mongol 2015 2016 - Sep lastSat 0:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
# Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta
Zone Asia/Hovd 6:06:36 - LMT 1905 Aug
6:00 - +06 1978
7:00 Mongol +07/+08
6:00 - %z 1978
7:00 Mongol %z
# Ulaanbaatar, a.k.a. Ulan Bataar, Ulan Bator, Urga
Zone Asia/Ulaanbaatar 7:07:32 - LMT 1905 Aug
7:00 - +07 1978
8:00 Mongol +08/+09
# Choibalsan, a.k.a. Bajan Tümen, Bajan Tumen, Chojbalsan,
# Choybalsan, Sanbejse, Tchoibalsan
Zone Asia/Choibalsan 7:38:00 - LMT 1905 Aug
7:00 - +07 1978
8:00 - +08 1983 Apr
9:00 Mongol +09/+10 2008 Mar 31
8:00 Mongol +08/+09
7:00 - %z 1978
8:00 Mongol %z
# Nepal
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Kathmandu 5:41:16 - LMT 1920
5:30 - +0530 1986
5:45 - +0545
5:30 - %z 1986
5:45 - %z
# Pakistan
@ -3102,10 +3130,10 @@ Rule Pakistan 2009 only - Apr 15 0:00 1:00 S
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Karachi 4:28:12 - LMT 1907
5:30 - +0530 1942 Sep
5:30 1:00 +0630 1945 Oct 15
5:30 - +0530 1951 Sep 30
5:00 - +05 1971 Mar 26
5:30 - %z 1942 Sep
5:30 1:00 %z 1945 Oct 15
5:30 - %z 1951 Sep 30
5:00 - %z 1971 Mar 26
5:00 Pakistan PK%sT # Pakistan Time
# Palestine
@ -3653,14 +3681,14 @@ Zone Asia/Hebron 2:20:23 - LMT 1900 Oct
# Philippine Star 2014-08-05
# http://www.philstar.com/headlines/2014/08/05/1354152/pnoy-urged-declare-use-daylight-saving-time
# From Paul Goyette (2018-06-15):
# From Paul Goyette (2018-06-15) with URLs updated by Guy Harris (2024-02-15):
# In the Philippines, there is a national law, Republic Act No. 10535
# which declares the official time here as "Philippine Standard Time".
# The act [1] even specifies use of PST as the abbreviation, although
# the FAQ provided by PAGASA [2] uses the "acronym PhST to distinguish
# it from the Pacific Standard Time (PST)."
# [1] http://www.officialgazette.gov.ph/2013/05/15/republic-act-no-10535/
# [2] https://www1.pagasa.dost.gov.ph/index.php/astronomy/philippine-standard-time#republic-act-10535
# [1] https://www.officialgazette.gov.ph/2013/05/15/republic-act-no-10535/
# [2] https://prsd.pagasa.dost.gov.ph/index.php/28-astronomy/302-philippine-standard-time
#
# From Paul Eggert (2018-06-19):
# I surveyed recent news reports, and my impression is that "PST" is
@ -3693,8 +3721,8 @@ Zone Asia/Manila -15:56:00 - LMT 1844 Dec 31
# Qatar
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha
4:00 - +04 1972 Jun
3:00 - +03
4:00 - %z 1972 Jun
3:00 - %z
# Kuwait
# Saudi Arabia
@ -3744,7 +3772,7 @@ Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14
3:00 - +03
3:00 - %z
# Singapore
# taken from Mok Ly Yng (2003-10-30)
@ -3752,13 +3780,13 @@ Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1
6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
7:00 - +07 1933 Jan 1
7:00 0:20 +0720 1936 Jan 1
7:20 - +0720 1941 Sep 1
7:30 - +0730 1942 Feb 16
9:00 - +09 1945 Sep 12
7:30 - +0730 1981 Dec 31 16:00u
8:00 - +08
7:00 - %z 1933 Jan 1
7:00 0:20 %z 1936 Jan 1
7:20 - %z 1941 Sep 1
7:30 - %z 1942 Feb 16
9:00 - %z 1945 Sep 12
7:30 - %z 1981 Dec 31 16:00u
8:00 - %z
# Spratly Is
# no information
@ -3816,13 +3844,13 @@ Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Colombo 5:19:24 - LMT 1880
5:19:32 - MMT 1906 # Moratuwa Mean Time
5:30 - +0530 1942 Jan 5
5:30 0:30 +06 1942 Sep
5:30 1:00 +0630 1945 Oct 16 2:00
5:30 - +0530 1996 May 25 0:00
6:30 - +0630 1996 Oct 26 0:30
6:00 - +06 2006 Apr 15 0:30
5:30 - +0530
5:30 - %z 1942 Jan 5
5:30 0:30 %z 1942 Sep
5:30 1:00 %z 1945 Oct 16 2:00
5:30 - %z 1996 May 25 0:00
6:30 - %z 1996 Oct 26 0:30
6:00 - %z 2006 Apr 15 0:30
5:30 - %z
# Syria
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
@ -3993,16 +4021,16 @@ Rule Syria 2009 2022 - Oct lastFri 0:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Damascus 2:25:12 - LMT 1920 # Dimashq
2:00 Syria EE%sT 2022 Oct 28 0:00
3:00 - +03
3:00 - %z
# Tajikistan
# From Shanks & Pottenger.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2
5:00 - +05 1930 Jun 21
6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
5:00 1:00 +06 1991 Sep 9 2:00s
5:00 - +05
5:00 - %z 1930 Jun 21
6:00 RussiaAsia %z 1991 Mar 31 2:00s
5:00 1:00 %z 1991 Sep 9 2:00s
5:00 - %z
# Cambodia
# Christmas I
@ -4012,16 +4040,16 @@ Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Bangkok 6:42:04 - LMT 1880
6:42:04 - BMT 1920 Apr # Bangkok Mean Time
7:00 - +07
7:00 - %z
# Turkmenistan
# From Shanks & Pottenger.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Ashgabat 3:53:32 - LMT 1924 May 2 # or Ashkhabad
4:00 - +04 1930 Jun 21
5:00 RussiaAsia +05/+06 1991 Mar 31 2:00
4:00 RussiaAsia +04/+05 1992 Jan 19 2:00
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 RussiaAsia %z 1991 Mar 31 2:00
4:00 RussiaAsia %z 1992 Jan 19 2:00
5:00 - %z
# Oman
# Réunion
@ -4031,25 +4059,25 @@ Zone Asia/Ashgabat 3:53:32 - LMT 1924 May 2 # or Ashkhabad
# The Crozet Is also observe Réunion time; see the 'antarctica' file.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Dubai 3:41:12 - LMT 1920
4:00 - +04
4:00 - %z
# Uzbekistan
# Byalokoz 1919 says Uzbekistan was 4:27:53.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Asia/Samarkand 4:27:53 - LMT 1924 May 2
4:00 - +04 1930 Jun 21
5:00 - +05 1981 Apr 1
5:00 1:00 +06 1981 Oct 1
6:00 - +06 1982 Apr 1
5:00 RussiaAsia +05/+06 1992
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 - %z 1981 Apr 1
5:00 1:00 %z 1981 Oct 1
6:00 - %z 1982 Apr 1
5:00 RussiaAsia %z 1992
5:00 - %z
# Milne says Tashkent was 4:37:10.8.
#STDOFF 4:37:10.8
Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
5:00 - +05 1930 Jun 21
6:00 RussiaAsia +06/+07 1991 Mar 31 2:00
5:00 RussiaAsia +05/+06 1992
5:00 - +05
5:00 - %z 1930 Jun 21
6:00 RussiaAsia %z 1991 Mar 31 2:00
5:00 RussiaAsia %z 1992
5:00 - %z
# Vietnam (southern)
@ -4107,7 +4135,7 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
# Võ Nguyên Giáp, Việt Nam Dân Quốc Công Báo, No. 1 (1945-09-29), page 13
# http://baochi.nlv.gov.vn/baochi/cgi-bin/baochi?a=d&d=JwvzO19450929.2.5&dliv=none
# It says that on 1945-09-01 at 24:00, Vietnam moved back two hours, to +07.
# It also mentions a 1945-03-29 decree (by a Japanese Goveror-General)
# It also mentions a 1945-03-29 decree (by a Japanese Governor-General)
# to set the time zone to +09, but does not say whether that decree
# merely legalized an earlier change to +09.
#
@ -4128,14 +4156,14 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
#STDOFF 7:06:30.13
Zone Asia/Ho_Chi_Minh 7:06:30 - LMT 1906 Jul 1
7:06:30 - PLMT 1911 May 1 # Phù Liễn MT
7:00 - +07 1942 Dec 31 23:00
8:00 - +08 1945 Mar 14 23:00
9:00 - +09 1945 Sep 1 24:00
7:00 - +07 1947 Apr 1
8:00 - +08 1955 Jul 1 01:00
7:00 - +07 1959 Dec 31 23:00
8:00 - +08 1975 Jun 13
7:00 - +07
7:00 - %z 1942 Dec 31 23:00
8:00 - %z 1945 Mar 14 23:00
9:00 - %z 1945 Sep 1 24:00
7:00 - %z 1947 Apr 1
8:00 - %z 1955 Jul 1 01:00
7:00 - %z 1959 Dec 31 23:00
8:00 - %z 1975 Jun 13
7:00 - %z
# From Paul Eggert (2019-02-19):
#

130
contrib/tzdata/australasia
View File

@ -43,8 +43,8 @@ Zone Australia/Perth 7:43:24 - LMT 1895 Dec
8:00 Aus AW%sT 1943 Jul
8:00 AW AW%sT
Zone Australia/Eucla 8:35:28 - LMT 1895 Dec
8:45 Aus +0845/+0945 1943 Jul
8:45 AW +0845/+0945
8:45 Aus %z 1943 Jul
8:45 AW %z
# Queensland
#
@ -209,8 +209,8 @@ Rule LH 2008 max - Apr Sun>=1 2:00 0 -
Rule LH 2008 max - Oct Sun>=1 2:00 0:30 -
Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
10:00 - AEST 1981 Mar
10:30 LH +1030/+1130 1985 Jul
10:30 LH +1030/+11
10:30 LH %z 1985 Jul
10:30 LH %z
# Australian miscellany
#
@ -416,16 +416,16 @@ Rule Fiji 2019 only - Nov Sun>=8 2:00 1:00 -
Rule Fiji 2020 only - Dec 20 2:00 1:00 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Fiji 11:55:44 - LMT 1915 Oct 26 # Suva
12:00 Fiji +12/+13
12:00 Fiji %z
# French Polynesia
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct 1 # Rikitea
-9:00 - -09
-9:00 - %z
Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct 1
-9:30 - -0930
-9:30 - %z
Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct 1 # Papeete
-10:00 - -10
-10:00 - %z
# Clipperton (near North America) is administered from French Polynesia;
# it is uninhabited.
@ -468,7 +468,7 @@ Rule Guam 1977 only - Aug 28 2:00 0 S
Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31
9:39:00 - LMT 1901 # Agana
10:00 - GST 1941 Dec 10 # Guam
9:00 - +09 1944 Jul 31
9:00 - %z 1944 Jul 31
10:00 Guam G%sT 2000 Dec 23
10:00 - ChST # Chamorro Standard Time
@ -480,30 +480,30 @@ Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31
# Wallis & Futuna
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
12:00 - +12
12:00 - %z
# Kiribati (except Gilbert Is)
# See Pacific/Tarawa for the Gilbert Is.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Kanton 0 - -00 1937 Aug 31
-12:00 - -12 1979 Oct
-11:00 - -11 1994 Dec 31
13:00 - +13
-12:00 - %z 1979 Oct
-11:00 - %z 1994 Dec 31
13:00 - %z
Zone Pacific/Kiritimati -10:29:20 - LMT 1901
-10:40 - -1040 1979 Oct
-10:00 - -10 1994 Dec 31
14:00 - +14
-10:40 - %z 1979 Oct
-10:00 - %z 1994 Dec 31
14:00 - %z
# Marshall Is
# See Pacific/Tarawa for most locations.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Kwajalein 11:09:20 - LMT 1901
11:00 - +11 1937
10:00 - +10 1941 Apr 1
9:00 - +09 1944 Feb 6
11:00 - +11 1969 Oct
-12:00 - -12 1993 Aug 20 24:00
12:00 - +12
11:00 - %z 1937
10:00 - %z 1941 Apr 1
9:00 - %z 1944 Feb 6
11:00 - %z 1969 Oct
-12:00 - %z 1993 Aug 20 24:00
12:00 - %z
# Micronesia
# For Chuuk and Yap see Pacific/Port_Moresby.
@ -511,22 +511,22 @@ Zone Pacific/Kwajalein 11:09:20 - LMT 1901
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Kosrae -13:08:04 - LMT 1844 Dec 31
10:51:56 - LMT 1901
11:00 - +11 1914 Oct
9:00 - +09 1919 Feb 1
11:00 - +11 1937
10:00 - +10 1941 Apr 1
9:00 - +09 1945 Aug
11:00 - +11 1969 Oct
12:00 - +12 1999
11:00 - +11
11:00 - %z 1914 Oct
9:00 - %z 1919 Feb 1
11:00 - %z 1937
10:00 - %z 1941 Apr 1
9:00 - %z 1945 Aug
11:00 - %z 1969 Oct
12:00 - %z 1999
11:00 - %z
# Nauru
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
11:30 - +1130 1942 Aug 29
9:00 - +09 1945 Sep 8
11:30 - +1130 1979 Feb 10 2:00
12:00 - +12
11:30 - %z 1942 Aug 29
9:00 - %z 1945 Sep 8
11:30 - %z 1979 Feb 10 2:00
12:00 - %z
# New Caledonia
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
@ -537,7 +537,7 @@ Rule NC 1996 only - Dec 1 2:00s 1:00 -
Rule NC 1997 only - Mar 2 2:00s 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13 # Nouméa
11:00 NC +11/+12
11:00 NC %z
###############################################################################
@ -581,8 +581,8 @@ Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2
12:00 NZ NZ%sT
Zone Pacific/Chatham 12:13:48 - LMT 1868 Nov 2
12:15 - +1215 1946 Jan 1
12:45 Chatham +1245/+1345
12:15 - %z 1946 Jan 1
12:45 Chatham %z
# Auckland Is
# uninhabited; Māori and Moriori, colonial settlers, pastoralists, sealers,
@ -635,8 +635,8 @@ Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Rarotonga 13:20:56 - LMT 1899 Dec 26 # Avarua
-10:39:04 - LMT 1952 Oct 16
-10:30 - -1030 1978 Nov 12
-10:00 Cook -10/-0930
-10:30 - %z 1978 Nov 12
-10:00 Cook %z
###############################################################################
@ -653,30 +653,30 @@ Zone Pacific/Rarotonga 13:20:56 - LMT 1899 Dec 26 # Avarua
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Niue -11:19:40 - LMT 1952 Oct 16 # Alofi
-11:20 - -1120 1964 Jul
-11:00 - -11
-11:20 - %z 1964 Jul
-11:00 - %z
# Norfolk
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
11:12 - +1112 1951
11:30 - +1130 1974 Oct 27 02:00s
11:30 1:00 +1230 1975 Mar 2 02:00s
11:30 - +1130 2015 Oct 4 02:00s
11:00 - +11 2019 Jul
11:00 AN +11/+12
11:12 - %z 1951
11:30 - %z 1974 Oct 27 02:00s
11:30 1:00 %z 1975 Mar 2 02:00s
11:30 - %z 2015 Oct 4 02:00s
11:00 - %z 2019 Jul
11:00 AN %z
# Palau (Belau)
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Palau -15:02:04 - LMT 1844 Dec 31 # Koror
8:57:56 - LMT 1901
9:00 - +09
9:00 - %z
# Papua New Guinea
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
9:48:32 - PMMT 1895 # Port Moresby Mean Time
10:00 - +10
10:00 - %z
#
# From Paul Eggert (2014-10-13):
# Base the Bougainville entry on the Arawa-Kieta region, which appears to have
@ -697,16 +697,16 @@ Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
#
Zone Pacific/Bougainville 10:22:16 - LMT 1880
9:48:32 - PMMT 1895
10:00 - +10 1942 Jul
9:00 - +09 1945 Aug 21
10:00 - +10 2014 Dec 28 2:00
11:00 - +11
10:00 - %z 1942 Jul
9:00 - %z 1945 Aug 21
10:00 - %z 2014 Dec 28 2:00
11:00 - %z
# Pitcairn
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
-8:30 - -0830 1998 Apr 27 0:00
-8:00 - -08
-8:30 - %z 1998 Apr 27 0:00
-8:00 - %z
# American Samoa
# Midway
@ -795,15 +795,15 @@ Rule WS 2012 2020 - Sep lastSun 3:00 1 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Apia 12:33:04 - LMT 1892 Jul 5
-11:26:56 - LMT 1911
-11:30 - -1130 1950
-11:00 WS -11/-10 2011 Dec 29 24:00
13:00 WS +13/+14
-11:30 - %z 1950
-11:00 WS %z 2011 Dec 29 24:00
13:00 WS %z
# Solomon Is
# excludes Bougainville, for which see Papua New Guinea
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct 1 # Honiara
11:00 - +11
11:00 - %z
# Tokelau
#
@ -826,8 +826,8 @@ Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct 1 # Honiara
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Fakaofo -11:24:56 - LMT 1901
-11:00 - -11 2011 Dec 30
13:00 - +13
-11:00 - %z 2011 Dec 30
13:00 - %z
# Tonga
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
@ -839,9 +839,9 @@ Rule Tonga 2016 only - Nov Sun>=1 2:00 1:00 -
Rule Tonga 2017 only - Jan Sun>=15 3:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Tongatapu 12:19:12 - LMT 1945 Sep 10
12:20 - +1220 1961
13:00 - +13 1999
13:00 Tonga +13/+14
12:20 - %z 1961
13:00 - %z 1999
13:00 Tonga %z
# US minor outlying islands
@ -930,7 +930,7 @@ Rule Vanuatu 1992 1993 - Jan Sat>=22 24:00 0 -
Rule Vanuatu 1992 only - Oct Sat>=22 24:00 1:00 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
11:00 Vanuatu +11/+12
11:00 Vanuatu %z
###############################################################################

15
contrib/tzdata/backward
View File

@ -1,9 +1,10 @@
# tzdb links for backward compatibility
# Links and zones for backward compatibility
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
# This file provides links from old or merged timezone names to current ones.
# It also provides a few zone entries for old naming conventions.
# Many names changed in 1993 and in 1995, and many merged names moved here
# in the period from 2013 through 2022. Several of these names are
# also present in the file 'backzone', which has data important only
@ -44,6 +45,8 @@ Link America/Rio_Branco Brazil/Acre #= America/Porto_Acre
Link America/Noronha Brazil/DeNoronha
Link America/Sao_Paulo Brazil/East
Link America/Manaus Brazil/West
Link Europe/Brussels CET
Link America/Chicago CST6CDT
Link America/Halifax Canada/Atlantic
Link America/Winnipeg Canada/Central
# This line is commented out, as the name exceeded the 14-character limit
@ -58,6 +61,9 @@ Link America/Whitehorse Canada/Yukon
Link America/Santiago Chile/Continental
Link Pacific/Easter Chile/EasterIsland
Link America/Havana Cuba
Link Europe/Athens EET
Link America/Panama EST
Link America/New_York EST5EDT
Link Africa/Cairo Egypt
Link Europe/Dublin Eire
# Vanguard section, for most .zi parsers.
@ -96,6 +102,9 @@ Link America/Jamaica Jamaica
Link Asia/Tokyo Japan
Link Pacific/Kwajalein Kwajalein
Link Africa/Tripoli Libya
Link Europe/Brussels MET
Link America/Phoenix MST
Link America/Denver MST7MDT
Link America/Tijuana Mexico/BajaNorte
Link America/Mazatlan Mexico/BajaSur
Link America/Mexico_City Mexico/General
@ -275,6 +284,7 @@ Link America/Denver America/Shiprock
Link America/Toronto America/Thunder_Bay
Link America/Edmonton America/Yellowknife
Link Pacific/Auckland Antarctica/South_Pole
Link Asia/Ulaanbaatar Asia/Choibalsan
Link Asia/Shanghai Asia/Chongqing
Link Asia/Shanghai Asia/Harbin
Link Asia/Urumqi Asia/Kashgar
@ -289,6 +299,7 @@ Link Europe/Kyiv Europe/Zaporozhye
Link Pacific/Kanton Pacific/Enderbury
Link Pacific/Honolulu Pacific/Johnston
Link Pacific/Port_Moresby Pacific/Yap
Link Europe/Lisbon WET
# Alternate names for the same location
@ -314,5 +325,7 @@ Link Europe/Kyiv Europe/Kiev
# Classically, Cyprus is in Asia; e.g. see Herodotus, Histories, I.72.
# However, for various reasons many users expect to find it under Europe.
Link Asia/Nicosia Europe/Nicosia
Link Pacific/Honolulu HST
Link America/Los_Angeles PST8PDT
Link Pacific/Guadalcanal Pacific/Ponape #= Pacific/Pohnpei
Link Pacific/Port_Moresby Pacific/Truk #= Pacific/Chuuk

35
contrib/tzdata/backzone
View File

@ -346,10 +346,8 @@ Zone Africa/Lome 0:04:52 - LMT 1893
# Angola
#
# From Paul Eggert (2018-02-16):
# Shanks gives 1911-05-26 for the transition to WAT,
# evidently confusing the date of the Portuguese decree
# (see Europe/Lisbon) with the date that it took effect.
# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
# For timestamps before independence, see commentary for Europe/Lisbon.
#
Zone Africa/Luanda 0:52:56 - LMT 1892
0:52:04 - LMT 1911 Dec 31 23:00u # Luanda MT?
@ -1086,10 +1084,10 @@ Zone Asia/Muscat 3:54:24 - LMT 1920
4:00 - +04
# India
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
# Portuguese India switched to UT +05 on 1912-01-01.
# From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a
# heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-24), Portuguese India switched to
# UT +05 on 1912-01-01 (see Europe/Lisbon).
#Zone Asia/Panaji [not enough info to complete]
# Cambodia
@ -1829,6 +1827,27 @@ Zone Pacific/Wake 11:06:28 - LMT 1901
Zone Pacific/Wallis 12:15:20 - LMT 1901
12:00 - +12
# From Paul Eggert (2024-05-22):
# The following zones pretend that standard time extends backward
# indefinitely into the past, and so are ahistorical.
# In current TZDB these entries are links to geographical locations
# that agree with the ahistorical zones since 1970.
# These are in numeric rather than alphabetic order.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone HST -10:00 - HST
Zone PST8PDT -8:00 US P%sT
Zone MST -7:00 - MST
Zone MST7MDT -7:00 US M%sT
Zone CST6CDT -6:00 US C%sT
Zone EST -5:00 - EST
Zone EST5EDT -5:00 US E%sT
Zone WET 0:00 EU WE%sT
Zone CET 1:00 C-Eur CE%sT
Zone MET 1:00 C-Eur ME%sT
Zone EET 2:00 EU EE%sT
# Local Variables:
# coding: utf-8
# End:

4
contrib/tzdata/checknow.awk
View File

@ -14,7 +14,7 @@ BEGIN {
if ($0 ~ /^TZ/) {
record_zone(zone, data)
zone = $0
sub(/.*\.dir\//, "", zone)
sub(/.*\.ckd\//, "", zone)
sub(/\/\//, "/", zone)
sub(/"/, "", zone)
data = ""
@ -45,7 +45,7 @@ END {
for (zone in zone_data) {
data = zone_data[zone]
if (!zonenow[data]) {
printf "zonenow.tab should have one of:%s\n", zones[data]
printf "Zone table should have one of:%s\n", zones[data]
zonenow[data] = zone # This suppresses duplicate diagnostics.
status = 1
}

54
contrib/tzdata/etcetera
View File

@ -5,7 +5,7 @@
# These entries are for uses not otherwise covered by the tz database.
# Their main practical use is for platforms like Android that lack
# support for POSIX.1-2017-style TZ strings. On such platforms these entries
# support for POSIX proleptic TZ strings. On such platforms these entries
# can be useful if the timezone database is wrong or if a ship or
# aircraft at sea is not in a timezone.
@ -51,29 +51,29 @@ Link Etc/GMT GMT
# so we moved the names into the Etc subdirectory.
# Also, the time zone abbreviations are now compatible with %z.
Zone Etc/GMT-14 14 - +14
Zone Etc/GMT-13 13 - +13
Zone Etc/GMT-12 12 - +12
Zone Etc/GMT-11 11 - +11
Zone Etc/GMT-10 10 - +10
Zone Etc/GMT-9 9 - +09
Zone Etc/GMT-8 8 - +08
Zone Etc/GMT-7 7 - +07
Zone Etc/GMT-6 6 - +06
Zone Etc/GMT-5 5 - +05
Zone Etc/GMT-4 4 - +04
Zone Etc/GMT-3 3 - +03
Zone Etc/GMT-2 2 - +02
Zone Etc/GMT-1 1 - +01
Zone Etc/GMT+1 -1 - -01
Zone Etc/GMT+2 -2 - -02
Zone Etc/GMT+3 -3 - -03
Zone Etc/GMT+4 -4 - -04
Zone Etc/GMT+5 -5 - -05
Zone Etc/GMT+6 -6 - -06
Zone Etc/GMT+7 -7 - -07
Zone Etc/GMT+8 -8 - -08
Zone Etc/GMT+9 -9 - -09
Zone Etc/GMT+10 -10 - -10
Zone Etc/GMT+11 -11 - -11
Zone Etc/GMT+12 -12 - -12
Zone Etc/GMT-14 14 - %z
Zone Etc/GMT-13 13 - %z
Zone Etc/GMT-12 12 - %z
Zone Etc/GMT-11 11 - %z
Zone Etc/GMT-10 10 - %z
Zone Etc/GMT-9 9 - %z
Zone Etc/GMT-8 8 - %z
Zone Etc/GMT-7 7 - %z
Zone Etc/GMT-6 6 - %z
Zone Etc/GMT-5 5 - %z
Zone Etc/GMT-4 4 - %z
Zone Etc/GMT-3 3 - %z
Zone Etc/GMT-2 2 - %z
Zone Etc/GMT-1 1 - %z
Zone Etc/GMT+1 -1 - %z
Zone Etc/GMT+2 -2 - %z
Zone Etc/GMT+3 -3 - %z
Zone Etc/GMT+4 -4 - %z
Zone Etc/GMT+5 -5 - %z
Zone Etc/GMT+6 -6 - %z
Zone Etc/GMT+7 -7 - %z
Zone Etc/GMT+8 -8 - %z
Zone Etc/GMT+9 -9 - %z
Zone Etc/GMT+10 -10 - %z
Zone Etc/GMT+11 -11 - %z
Zone Etc/GMT+12 -12 - %z

713
contrib/tzdata/europe
View File

@ -730,14 +730,6 @@ Rule Russia 1996 2010 - Oct lastSun 2:00s 0 -
# Take "abolishing daylight saving time" to mean that time is now considered
# to be standard.
# These are for backward compatibility with older versions.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone WET 0:00 EU WE%sT
Zone CET 1:00 C-Eur CE%sT
Zone MET 1:00 C-Eur ME%sT
Zone EET 2:00 EU EE%sT
# Previous editions of this database used abbreviations like MET DST
# for Central European Summer Time, but this didn't agree with common usage.
@ -871,7 +863,7 @@ Zone Europe/Minsk 1:50:16 - LMT 1880
3:00 Russia MSK/MSD 1990
3:00 - MSK 1991 Mar 31 2:00s
2:00 Russia EE%sT 2011 Mar 27 2:00s
3:00 - +03
3:00 - %z
# Belgium
# Luxembourg
@ -1176,22 +1168,22 @@ Rule Thule 2007 max - Nov Sun>=1 2:00 0 S
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Danmarkshavn -1:14:40 - LMT 1916 Jul 28
-3:00 - -03 1980 Apr 6 2:00
-3:00 EU -03/-02 1996
-3:00 - %z 1980 Apr 6 2:00
-3:00 EU %z 1996
0:00 - GMT
#
# Use the old name Scoresbysund, as the current name Ittoqqortoormiit
# exceeds tzdb's 14-letter limit and has no common English abbreviation.
Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit
-2:00 - -02 1980 Apr 6 2:00
-2:00 C-Eur -02/-01 1981 Mar 29
-1:00 EU -01/+00 2024 Mar 31
-2:00 EU -02/-01
-2:00 - %z 1980 Apr 6 2:00
-2:00 C-Eur %z 1981 Mar 29
-1:00 EU %z 2024 Mar 31
-2:00 EU %z
Zone America/Nuuk -3:26:56 - LMT 1916 Jul 28 # Godthåb
-3:00 - -03 1980 Apr 6 2:00
-3:00 EU -03/-02 2023 Mar 26 1:00u
-2:00 - -02 2023 Oct 29 1:00u
-2:00 EU -02/-01
-3:00 - %z 1980 Apr 6 2:00
-3:00 EU %z 2023 Mar 26 1:00u
-2:00 - %z 2023 Oct 29 1:00u
-2:00 EU %z
Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik
-4:00 Thule A%sT
@ -2063,10 +2055,39 @@ Zone Europe/Warsaw 1:24:00 - LMT 1880
# Portugal
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
# https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf
# Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00.
# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07) and Michael
# Deckers (2021-02-10):
# http://oal.ul.pt/documentos/2018/01/hl1911a2018.pdf/
# The Astronomical Observatory of Lisbon has published a list detailing the
# historical transitions in legal time within continental Portugal. It
# directly references many decrees and ordinances which are, in turn,
# referenced below. They can be viewed in the public archives of the Diário da
# República (until 1976-04-09 known as the Diário do Govêrno) at
# https://dre.pt/ (in Portuguese).
#
# Most of the Rules below have been updated simply to match the Observatory's
# listing for continental (mainland) Portugal. Although there are over 50
# referenced decrees and ordinances, only the handful with comments below have
# been verified against the text, typically to provide additional confidence
# wherever dates provided by Whitman and Shanks & Pottenger had disagreed.
# See further below for the Azores and Madeira.
# From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a
# heads-up from Stephen Colebourne:
# According to a 1911-05-24 Portuguese decree, Lisbon was at -0:36:44.68, but
# switched to GMT on 1912-01-01 at 00:00.
# https://dre.pt/dr/detalhe/decreto/593090
# https://dre.pt/application/conteudo/593090
# The decree made legal time throughout Portugal and her possessions
# "subordinate to the Greenwich meridian, according to the principle adopted at
# the Washington Convention in 1884" and eliminated the "difference of five
# minutes between the internal and external clocks of railway stations".
#
# The decree was gazetted in the 1911-05-30 issue of Diário do Govêrno, and is
# considered to be dated 1911-05-24 by that issue's summary; however, the text
# of the decree itself is dated 1911-05-26. The Diário da República website
# notes the discrepancy, but later laws and the Observatory all seem to refer
# to this decree by the 1911-05-24 date.
#
# From Michael Deckers (2018-02-15):
# article 5 [of the 1911 decree; Deckers's translation] ...:
@ -2074,37 +2095,62 @@ Zone Europe/Warsaw 1:24:00 - LMT 1880
# according to the 2nd article, the civil day January 1, 1912 begins,
# all clocks therefore having to be advanced or set back correspondingly ...
# From Rui Pedro Salgueiro (1992-11-12):
# Portugal has recently (September, 27) changed timezone
# (from WET to MET or CET) to harmonize with EEC.
#
# Martin Bruckmann (1996-02-29) reports via Peter Ilieve
# that Portugal is reverting to 0:00 by not moving its clocks this spring.
# The new Prime Minister was fed up with getting up in the dark in the winter.
#
# From Paul Eggert (1996-11-12):
# IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions
# at 02:00u, not 01:00u. Assume that these are typos.
# IATA SSIM (1991/1992) reports that the Azores were at -1:00.
# IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00.
# Guess that the Azores changed to EU rules in 1992 (since that's when Portugal
# harmonized with EU rules), and that they stayed +0:00 that winter.
#
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
# DSH writes that despite Decree 1,469 (1915), the change to the clocks was not
# done every year, depending on what Spain did, because of railroad schedules.
# Go with Shanks & Pottenger.
# From Tim Parenti (2024-07-01), per Paul Eggert (1999-01-30):
# DSH writes in their history that Decreto 1469 of 1915-03-30 established
# summer time and that, "despite" this, the change to the clocks was not done
# every year, depending on what Spain did, because of railroad schedules.
# In fact, that decree had nothing to do with DST; rather, it regulated the
# sending of time signals. But we do see linkage to Spain in the 1920s below.
# https://dre.pt/dr/detalhe/decreto/1469-1915-285721
# https://dre.pt/application/conteudo/285721
#
# According to the Observatory, standard time was first advanced by Decreto
# 2433 of 1916-06-09 and restored by Decreto 2712 of 1916-10-28. While Whitman
# gives 1916-10-31 for the latter transition, Shanks & Pottenger agrees more
# closely with the decree, which stated that its provision "will start sixty
# minutes after the end of 31 October, according to the current time," i.e.,
# 01:00 on 1 November.
# https://dre.pt/dr/detalhe/decreto/2433-1916-267192
# https://dre.pt/application/conteudo/267192
# https://dre.pt/dr/detalhe/decreto/2712-1916-590937
# https://dre.pt/application/conteudo/590937
Rule Port 1916 only - Jun 17 23:00 1:00 S
# Whitman gives 1916 Oct 31; go with Shanks & Pottenger.
Rule Port 1916 only - Nov 1 1:00 0 -
Rule Port 1917 only - Feb 28 23:00s 1:00 S
Rule Port 1917 1921 - Oct 14 23:00s 0 -
Rule Port 1918 only - Mar 1 23:00s 1:00 S
Rule Port 1919 only - Feb 28 23:00s 1:00 S
Rule Port 1920 only - Feb 29 23:00s 1:00 S
Rule Port 1921 only - Feb 28 23:00s 1:00 S
# From Tim Parenti (2024-07-01):
# Article 7 of Decreto 2922 of 1916-12-30 stated that "the legal time will be
# advanced by sixty minutes from 1 March to 31 October." Per Article 15, this
# came into force from 1917-01-01. Just before the first fall back, Decreto
# 3446 of 1917-10-11 changed the annual end date to 14 October.
# https://dre.pt/dr/detalhe/decreto/2922-1916-261894
# https://dre.pt/application/conteudo/261894
# https://dre.pt/dr/detalhe/decreto/3446-1917-495161
# https://dre.pt/application/conteudo/495161
# This annual change was revoked by Decreto 8038 of 1922-02-18.
# https://dre.pt/dr/detalhe/decreto/8038-1922-569751
# https://dre.pt/application/conteudo/569751
Rule Port 1917 1921 - Mar 1 0:00 1:00 S
Rule Port 1917 1921 - Oct 14 24:00 0 -
# From Tim Parenti (2024-07-01):
# Decreto 9592 of 1924-04-14 noted that "France maintains the advance of legal
# time in the summer and Spain has now adopted it for the first time" and
# considered "that the absence of similar measures would cause serious
# difficulties for international rail connections with consequent repercussions
# on domestic service hours..." along with "inconvenient analogues...for postal
# and telegraph services." Summer time would be in effect from 17 April to 4
# October, with the spring change explicitly specified by bringing clocks
# forward from 16 April 23:00.
# https://dre.pt/dr/detalhe/decreto/9592-1924-652133
# https://dre.pt/application/conteudo/652133
#
# Decreto 10700, issued 1925-04-16, noted that Spain had not continued summer
# time, declared that "the current legal hour prior to 17 April remains
# unchanged from that day forward", and revoked legislation to the contrary,
# just a day before summer time would have otherwise resumed.
# https://dre.pt/dr/detalhe/decreto/10700-1925-437826
# https://dre.pt/application/conteudo/437826
Rule Port 1924 only - Apr 16 23:00s 1:00 S
Rule Port 1924 only - Oct 14 23:00s 0 -
Rule Port 1924 only - Oct 4 23:00s 0 -
Rule Port 1926 only - Apr 17 23:00s 1:00 S
Rule Port 1926 1929 - Oct Sat>=1 23:00s 0 -
Rule Port 1927 only - Apr 9 23:00s 1:00 S
@ -2116,6 +2162,8 @@ Rule Port 1931 1932 - Oct Sat>=1 23:00s 0 -
Rule Port 1932 only - Apr 2 23:00s 1:00 S
Rule Port 1934 only - Apr 7 23:00s 1:00 S
# Whitman gives 1934 Oct 5; go with Shanks & Pottenger.
# Note: The 1935 law specified 10-06 00:00, not 10-05 24:00, but the following
# is equivalent and more succinct.
Rule Port 1934 1938 - Oct Sat>=1 23:00s 0 -
# Shanks & Pottenger give 1935 Apr 30; go with Whitman.
Rule Port 1935 only - Mar 30 23:00s 1:00 S
@ -2126,10 +2174,19 @@ Rule Port 1938 only - Mar 26 23:00s 1:00 S
Rule Port 1939 only - Apr 15 23:00s 1:00 S
# Whitman gives 1939 Oct 7; go with Shanks & Pottenger.
Rule Port 1939 only - Nov 18 23:00s 0 -
# From Tim Parenti (2024-07-01):
# Portaria 9465 of 1940-02-17 advanced clocks from Saturday 1940-02-24 23:00.
# The clocks were restored by Portaria 9658, issued Monday 1940-10-07,
# effective from 24:00 that very night, which agrees with Shanks & Pottenger;
# Whitman gives Saturday 1940-10-05 instead.
# https://dre.pt/dr/detalhe/portaria/9465-1940-189096
# https://dre.pt/application/conteudo/189096
# https://dre.pt/dr/detalhe/portaria/9658-1940-196729
# https://dre.pt/application/conteudo/196729
Rule Port 1940 only - Feb 24 23:00s 1:00 S
# Shanks & Pottenger give 1940 Oct 7; go with Whitman.
Rule Port 1940 1941 - Oct 5 23:00s 0 -
Rule Port 1940 only - Oct 7 23:00s 0 -
Rule Port 1941 only - Apr 5 23:00s 1:00 S
Rule Port 1941 only - Oct 5 23:00s 0 -
Rule Port 1942 1945 - Mar Sat>=8 23:00s 1:00 S
Rule Port 1942 only - Apr 25 22:00s 2:00 M # Midsummer
Rule Port 1942 only - Aug 15 22:00s 1:00 S
@ -2139,66 +2196,195 @@ Rule Port 1943 1945 - Aug Sat>=25 22:00s 1:00 S
Rule Port 1944 1945 - Apr Sat>=21 22:00s 2:00 M
Rule Port 1946 only - Apr Sat>=1 23:00s 1:00 S
Rule Port 1946 only - Oct Sat>=1 23:00s 0 -
# Whitman says DST was not observed in 1950; go with Shanks & Pottenger.
# Whitman gives Oct lastSun for 1952 on; go with Shanks & Pottenger.
Rule Port 1947 1965 - Apr Sun>=1 2:00s 1:00 S
# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07):
# The Astronomical Observatory of Lisbon cites Portaria 11767 of 1947-03-28 for
# 1947 and Portaria 12286 of 1948-02-19 for 1948.
# https://dre.pt/dr/detalhe/portaria/11767-1947-414787
# https://dre.pt/application/conteudo/414787
# https://dre.pt/dr/detalhe/portaria/12286-1948-152953
# https://dre.pt/application/conteudo/152953
#
# Although the latter ordinance explicitly had the 1948-10-03 transition
# scheduled for 02:00 rather than 03:00 as had been used in 1947, Decreto-Lei
# 37048 of 1948-09-07 recognized "that it is advisable to definitely set...the
# 'summer time' regime", and fixed the fall transition at 03:00 moving forward.
# https://dre.pt/dr/detalhe/decreto-lei/37048-1948-373810
# https://dre.pt/application/conteudo/373810
# While the Observatory only cites this act for 1949-1965 and not for 1948, it
# does not appear to have had any provision delaying its effect, so assume that
# it overrode the prior ordinance for 1948-10-03.
#
# Whitman says DST was not observed in 1950 and gives Oct lastSun for 1952 on.
# The Observatory, however, agrees with Shanks & Pottenger that 1950 was not an
# exception and that Oct Sun>=1 was maintained through 1965.
Rule Port 1947 1966 - Apr Sun>=1 2:00s 1:00 S
Rule Port 1947 1965 - Oct Sun>=1 2:00s 0 -
Rule Port 1977 only - Mar 27 0:00s 1:00 S
Rule Port 1977 only - Sep 25 0:00s 0 -
Rule Port 1978 1979 - Apr Sun>=1 0:00s 1:00 S
Rule Port 1978 only - Oct 1 0:00s 0 -
Rule Port 1979 1982 - Sep lastSun 1:00s 0 -
Rule Port 1980 only - Mar lastSun 0:00s 1:00 S
Rule Port 1981 1982 - Mar lastSun 1:00s 1:00 S
Rule Port 1983 only - Mar lastSun 2:00s 1:00 S
# From Tim Parenti (2024-07-01):
# Decreto-Lei 47233 of 1966-10-01 considered that the "duality" in time was
# "the cause of serious disturbances" and noted that "the countries with which
# we have the most frequent contacts...have already adopted" a solution
# coinciding with the extant "summer time". It established that the former
# "summer time" would apply year-round on the mainland and adjacent islands
# with immediate effect, as the fall back would have otherwise occurred later
# that evening.
# https://dre.pt/dr/detalhe/decreto-lei/47233-1966-293729
# Model this by changing zones without changing clocks at the
# previously-appointed fall back time.
#
# Decreto-Lei 309/76 of 1976-04-27 acknowledged that those international
# contacts had returned to adopting seasonal times, and considered that the
# year-round advancement "entails considerable sacrifices for the vast majority
# of the working population during the winter months", including morning
# visibility concerns for schoolchildren. It specified, beginning 1976-09-26
# 01:00, an annual return to UT+00 on the mainland from 00:00 UT on Sep lastSun
# to 00:00 UT on Mar lastSun (unless the latter date fell on Easter, in which
# case it was to be brought forward to the preceding Sunday). It also assigned
# the Permanent Time Commission to study and propose revisions for the Azores
# and Madeira, neither of which resumed DST until 1982 (as described further
# below).
# https://dre.pt/dr/detalhe/decreto-lei/309-1976-502063
Rule Port 1976 only - Sep lastSun 1:00 0 -
Rule Port 1977 only - Mar lastSun 0:00s 1:00 S
Rule Port 1977 only - Sep lastSun 0:00s 0 -
# From Tim Parenti (2024-07-01):
# Beginning in 1978, rather than triggering the Easter rule of the 1976 decree
# (Easter fell on 1978-03-26), Article 5 was used instead, which allowed DST
# dates to be changed by order of the Minister of Education and Scientific
# Research, upon consultation with the Permanent Time Commission, "whenever
# considered convenient." As such, a series of one-off ordinances were
# promulgated for the mainland in 1978 through 1980, after which the 1976
# decree naturally came back into force from 1981.
Rule Port 1978 1980 - Apr Sun>=1 1:00s 1:00 S
Rule Port 1978 only - Oct 1 1:00s 0 -
Rule Port 1979 1980 - Sep lastSun 1:00s 0 -
Rule Port 1981 1986 - Mar lastSun 0:00s 1:00 S
Rule Port 1981 1985 - Sep lastSun 0:00s 0 -
# From Tim Parenti (2024-07-01):
# Decreto-Lei 44-B/86 of 1986-03-07 switched mainland Portugal's transition
# times from 0:00s to 1:00u to harmonize with the EEC from 1986-03-30.
# https://dre.pt/dr/detalhe/decreto-lei/44-b-1986-628280
# (Transitions of 1:00s as previously reported and used by the W-Eur rules,
# though equivalent, appear to have been fiction here.) Madeira continued to
# use 0:00s for spring 1986 before joining with the mainland using 1:00u in the
# fall; meanwhile, in the Azores the two were equivalent, so the law specifying
# 0:00s wasn't touched until 1992. (See below for more on the islands.)
#
# From Rui Pedro Salgueiro (1992-11-12):
# Portugal has recently (September, 27) changed timezone
# (from WET to MET or CET) to harmonize with EEC.
#
# Martin Bruckmann (1996-02-29) reports via Peter Ilieve
# that Portugal is reverting to 0:00 by not moving its clocks this spring.
# The new Prime Minister was fed up with getting up in the dark in the winter.
#
# From Paul Eggert (1996-11-12):
# IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions
# at 02:00u, not 01:00u. Assume that these are typos.
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
#STDOFF -0:36:44.68
Zone Europe/Lisbon -0:36:45 - LMT 1884
-0:36:45 - LMT 1912 Jan 1 0:00u # Lisbon MT
0:00 Port WE%sT 1966 Apr 3 2:00
0:00 Port WE%sT 1966 Oct 2 2:00s
1:00 - CET 1976 Sep 26 1:00
0:00 Port WE%sT 1983 Sep 25 1:00s
0:00 W-Eur WE%sT 1992 Sep 27 1:00s
0:00 Port WE%sT 1986
0:00 EU WE%sT 1992 Sep 27 1:00u
1:00 EU CE%sT 1996 Mar 31 1:00u
0:00 EU WE%sT
# From Tim Parenti (2024-07-01):
# For the Azores and Madeira, legislation was followed from the laws currently
# in force as listed at:
# https://oal.ul.pt/hora-legal/legislacao/
# working backward through references of revocation and abrogation to
# Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the
# mainland and its adjacent islands. Because of that reference, it is
# therefore assumed that DST rules in the islands prior to 1966 were like that
# of the mainland, though most legislation of the time didn't explicitly
# specify DST practices for the islands.
Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada
-1:54:32 - HMT 1912 Jan 1 2:00u # Horta MT
# Vanguard section, for zic and other parsers that support %z.
# -2:00 Port %z 1966 Apr 3 2:00
# -1:00 Port %z 1983 Sep 25 1:00s
# -1:00 W-Eur %z 1992 Sep 27 1:00s
-2:00 Port %z 1966 Oct 2 2:00s
# From Tim Parenti (2024-07-01):
# While Decreto-Lei 309/76 of 1976-04-27 reintroduced DST on the mainland by
# falling back on 1976-09-26, it assigned the Permanent Time Commission to
# study and propose revisions for the Azores and Madeira. Decreto Regional
# 9/77/A of 1977-05-17 affirmed that "the legal time remained unchanged in the
# Azores" at UT-1, and would remain there year-round.
# https://dre.pt/dr/detalhe/decreto-regional/9-1977-252066
#
# Decreto Regional 2/82/A, published 1982-03-02, adopted DST in the same
# fashion as the mainland used at the time.
# https://dre.pt/dr/detalhe/decreto-regional/2-1982-599965
# Though transitions in the Azores officially remained at 0:00s through 1992,
# this was equivalent to the EU-style 1:00u adopted by the mainland in 1986, so
# model it as such.
-1:00 - %z 1982 Mar 28 0:00s
-1:00 Port %z 1986
# Rearguard section, for parsers lacking %z; see ziguard.awk.
-2:00 Port -02/-01 1942 Apr 25 22:00s
-2:00 Port +00 1942 Aug 15 22:00s
-2:00 Port -02/-01 1943 Apr 17 22:00s
-2:00 Port +00 1943 Aug 28 22:00s
-2:00 Port -02/-01 1944 Apr 22 22:00s
-2:00 Port +00 1944 Aug 26 22:00s
-2:00 Port -02/-01 1945 Apr 21 22:00s
-2:00 Port +00 1945 Aug 25 22:00s
-2:00 Port -02/-01 1966 Apr 3 2:00
-1:00 Port -01/+00 1983 Sep 25 1:00s
-1:00 W-Eur -01/+00 1992 Sep 27 1:00s
# -2:00 Port -02/-01 1942 Apr 25 22:00s
# -2:00 Port +00 1942 Aug 15 22:00s
# -2:00 Port -02/-01 1943 Apr 17 22:00s
# -2:00 Port +00 1943 Aug 28 22:00s
# -2:00 Port -02/-01 1944 Apr 22 22:00s
# -2:00 Port +00 1944 Aug 26 22:00s
# -2:00 Port -02/-01 1945 Apr 21 22:00s
# -2:00 Port +00 1945 Aug 25 22:00s
# -2:00 Port -02/-01 1966 Oct 2 2:00s
# -1:00 - -01 1982 Mar 28 0:00s
# -1:00 Port -01/+00 1986
# End of rearguard section.
0:00 EU WE%sT 1993 Mar 28 1:00u
-1:00 EU -01/+00
#
# From Paul Eggert (1996-11-12):
# IATA SSIM (1991/1992) reports that the Azores were at -1:00.
# IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00.
#
# From Tim Parenti (2024-07-01):
# After mainland Portugal had shifted forward an hour from 1992-09-27, Decreto
# Legislativo Regional 29/92/A of 1992-12-23 sought to "reduce the time
# difference" by shifting the Azores forward as well from 1992-12-27. Just six
# months later, this was revoked by Decreto Legislativo Regional 9/93/A, citing
# "major changes in work habits and way of life." Though the revocation didn't
# give a transition time, it was signed Wednesday 1993-06-16; assume it took
# effect later that evening, and that an EU-style spring forward (to +01) was
# still observed in the interim on 1993-03-28.
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/29-1992-621553
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/9-1993-389633
-1:00 EU %z 1992 Dec 27 1:00s
0:00 EU WE%sT 1993 Jun 17 1:00u
-1:00 EU %z
Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal
-1:07:36 - FMT 1912 Jan 1 1:00u # Funchal MT
# Vanguard section, for zic and other parsers that support %z.
# -1:00 Port %z 1966 Apr 3 2:00
-1:00 Port %z 1966 Oct 2 2:00s
# Rearguard section, for parsers lacking %z; see ziguard.awk.
-1:00 Port -01/+00 1942 Apr 25 22:00s
-1:00 Port +01 1942 Aug 15 22:00s
-1:00 Port -01/+00 1943 Apr 17 22:00s
-1:00 Port +01 1943 Aug 28 22:00s
-1:00 Port -01/+00 1944 Apr 22 22:00s
-1:00 Port +01 1944 Aug 26 22:00s
-1:00 Port -01/+00 1945 Apr 21 22:00s
-1:00 Port +01 1945 Aug 25 22:00s
-1:00 Port -01/+00 1966 Apr 3 2:00
# -1:00 Port -01/+00 1942 Apr 25 22:00s
# -1:00 Port +01 1942 Aug 15 22:00s
# -1:00 Port -01/+00 1943 Apr 17 22:00s
# -1:00 Port +01 1943 Aug 28 22:00s
# -1:00 Port -01/+00 1944 Apr 22 22:00s
# -1:00 Port +01 1944 Aug 26 22:00s
# -1:00 Port -01/+00 1945 Apr 21 22:00s
# -1:00 Port +01 1945 Aug 25 22:00s
# -1:00 Port -01/+00 1966 Oct 2 2:00s
# End of rearguard section.
0:00 Port WE%sT 1983 Sep 25 1:00s
#
# From Tim Parenti (2024-07-01):
# Decreto Regional 5/82/M, published 1982-04-03, established DST transitions at
# 0:00u, which for Madeira is equivalent to the mainland's rules (0:00s) at the
# time. It came into effect the day following its publication, Sunday
# 1982-04-04, thus resuming Madeira's DST practice about a week later than the
# mainland and the Azores.
# https://dre.pt/dr/detalhe/decreto-regional/5-1982-608273
#
# Decreto Legislativo Regional 18/86/M, published 1986-10-01, adopted EU-style
# rules (1:00u) and entered into immediate force after being signed on
# 1986-07-31.
# https://dre.pt/dr/detalhe/decreto-legislativo-regional/18-1986-221705
0:00 - WET 1982 Apr 4
0:00 Port WE%sT 1986 Jul 31
0:00 EU WE%sT
# Romania
@ -2410,7 +2596,7 @@ Zone Europe/Kaliningrad 1:22:00 - LMT 1893 Apr
2:00 Poland EE%sT 1946 Apr 7
3:00 Russia MSK/MSD 1989 Mar 26 2:00s
2:00 Russia EE%sT 2011 Mar 27 2:00s
3:00 - +03 2014 Oct 26 2:00s
3:00 - %z 2014 Oct 26 2:00s
2:00 - EET
@ -2660,14 +2846,14 @@ Zone Europe/Simferopol 2:16:24 - LMT 1880
# http://publication.pravo.gov.ru/Document/View/0001201602150056
Zone Europe/Astrakhan 3:12:12 - LMT 1924 May
3:00 - +03 1930 Jun 21
4:00 Russia +04/+05 1989 Mar 26 2:00s
3:00 Russia +03/+04 1991 Mar 31 2:00s
4:00 - +04 1992 Mar 29 2:00s
3:00 Russia +03/+04 2011 Mar 27 2:00s
4:00 - +04 2014 Oct 26 2:00s
3:00 - +03 2016 Mar 27 2:00s
4:00 - +04
3:00 - %z 1930 Jun 21
4:00 Russia %z 1989 Mar 26 2:00s
3:00 Russia %z 1991 Mar 31 2:00s
4:00 - %z 1992 Mar 29 2:00s
3:00 Russia %z 2011 Mar 27 2:00s
4:00 - %z 2014 Oct 26 2:00s
3:00 - %z 2016 Mar 27 2:00s
4:00 - %z
# From Paul Eggert (2016-11-11):
# Europe/Volgograd covers:
@ -2697,15 +2883,15 @@ Zone Europe/Astrakhan 3:12:12 - LMT 1924 May
# http://publication.pravo.gov.ru/Document/View/0001202012220002
Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3
3:00 - +03 1930 Jun 21
4:00 - +04 1961 Nov 11
4:00 Russia +04/+05 1988 Mar 27 2:00s
3:00 - %z 1930 Jun 21
4:00 - %z 1961 Nov 11
4:00 Russia %z 1988 Mar 27 2:00s
3:00 Russia MSK/MSD 1991 Mar 31 2:00s
4:00 - +04 1992 Mar 29 2:00s
4:00 - %z 1992 Mar 29 2:00s
3:00 Russia MSK/MSD 2011 Mar 27 2:00s
4:00 - MSK 2014 Oct 26 2:00s
3:00 - MSK 2018 Oct 28 2:00s
4:00 - +04 2020 Dec 27 2:00s
4:00 - %z 2020 Dec 27 2:00s
3:00 - MSK
# From Paul Eggert (2016-11-11):
@ -2720,14 +2906,14 @@ Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3
# http://publication.pravo.gov.ru/Document/View/0001201611220031
Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u
3:00 - +03 1930 Jun 21
4:00 Russia +04/+05 1988 Mar 27 2:00s
3:00 Russia +03/+04 1991 Mar 31 2:00s
4:00 - +04 1992 Mar 29 2:00s
3:00 Russia +03/+04 2011 Mar 27 2:00s
4:00 - +04 2014 Oct 26 2:00s
3:00 - +03 2016 Dec 4 2:00s
4:00 - +04
3:00 - %z 1930 Jun 21
4:00 Russia %z 1988 Mar 27 2:00s
3:00 Russia %z 1991 Mar 31 2:00s
4:00 - %z 1992 Mar 29 2:00s
3:00 Russia %z 2011 Mar 27 2:00s
4:00 - %z 2014 Oct 26 2:00s
3:00 - %z 2016 Dec 4 2:00s
4:00 - %z
# From Paul Eggert (2016-03-18):
# Europe/Kirov covers:
@ -2735,10 +2921,10 @@ Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u
# The 1989 transition is from USSR act No. 227 (1989-03-14).
#
Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u
3:00 - +03 1930 Jun 21
4:00 Russia +04/+05 1989 Mar 26 2:00s
3:00 - %z 1930 Jun 21
4:00 Russia %z 1989 Mar 26 2:00s
3:00 Russia MSK/MSD 1991 Mar 31 2:00s
4:00 - +04 1992 Mar 29 2:00s
4:00 - %z 1992 Mar 29 2:00s
3:00 Russia MSK/MSD 2011 Mar 27 2:00s
4:00 - MSK 2014 Oct 26 2:00s
3:00 - MSK
@ -2753,15 +2939,15 @@ Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u
# The 1989 transition is from USSR act No. 227 (1989-03-14).
Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 0:00u
3:00 - +03 1930 Jun 21
4:00 - +04 1935 Jan 27
4:00 Russia +04/+05 1989 Mar 26 2:00s
3:00 Russia +03/+04 1991 Mar 31 2:00s
2:00 Russia +02/+03 1991 Sep 29 2:00s
3:00 - +03 1991 Oct 20 3:00
4:00 Russia +04/+05 2010 Mar 28 2:00s
3:00 Russia +03/+04 2011 Mar 27 2:00s
4:00 - +04
3:00 - %z 1930 Jun 21
4:00 - %z 1935 Jan 27
4:00 Russia %z 1989 Mar 26 2:00s
3:00 Russia %z 1991 Mar 31 2:00s
2:00 Russia %z 1991 Sep 29 2:00s
3:00 - %z 1991 Oct 20 3:00
4:00 Russia %z 2010 Mar 28 2:00s
3:00 Russia %z 2011 Mar 27 2:00s
4:00 - %z
# From Paul Eggert (2016-03-18):
# Europe/Ulyanovsk covers:
@ -2777,14 +2963,14 @@ Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 0:00u
# http://publication.pravo.gov.ru/Document/View/0001201603090051
Zone Europe/Ulyanovsk 3:13:36 - LMT 1919 Jul 1 0:00u
3:00 - +03 1930 Jun 21
4:00 Russia +04/+05 1989 Mar 26 2:00s
3:00 Russia +03/+04 1991 Mar 31 2:00s
2:00 Russia +02/+03 1992 Jan 19 2:00s
3:00 Russia +03/+04 2011 Mar 27 2:00s
4:00 - +04 2014 Oct 26 2:00s
3:00 - +03 2016 Mar 27 2:00s
4:00 - +04
3:00 - %z 1930 Jun 21
4:00 Russia %z 1989 Mar 26 2:00s
3:00 Russia %z 1991 Mar 31 2:00s
2:00 Russia %z 1992 Jan 19 2:00s
3:00 Russia %z 2011 Mar 27 2:00s
4:00 - %z 2014 Oct 26 2:00s
3:00 - %z 2016 Mar 27 2:00s
4:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Yekaterinburg covers...
@ -2809,12 +2995,12 @@ Zone Europe/Ulyanovsk 3:13:36 - LMT 1919 Jul 1 0:00u
#STDOFF 4:02:32.9
Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3
3:45:05 - PMT 1919 Jul 15 4:00
4:00 - +04 1930 Jun 21
5:00 Russia +05/+06 1991 Mar 31 2:00s
4:00 Russia +04/+05 1992 Jan 19 2:00s
5:00 Russia +05/+06 2011 Mar 27 2:00s
6:00 - +06 2014 Oct 26 2:00s
5:00 - +05
4:00 - %z 1930 Jun 21
5:00 Russia %z 1991 Mar 31 2:00s
4:00 Russia %z 1992 Jan 19 2:00s
5:00 Russia %z 2011 Mar 27 2:00s
6:00 - %z 2014 Oct 26 2:00s
5:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
@ -2824,12 +3010,12 @@ Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3
# Byalokoz 1919 says Omsk was 4:53:30.
Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14
5:00 - +05 1930 Jun 21
6:00 Russia +06/+07 1991 Mar 31 2:00s
5:00 Russia +05/+06 1992 Jan 19 2:00s
6:00 Russia +06/+07 2011 Mar 27 2:00s
7:00 - +07 2014 Oct 26 2:00s
6:00 - +06
5:00 - %z 1930 Jun 21
6:00 Russia %z 1991 Mar 31 2:00s
5:00 Russia %z 1992 Jan 19 2:00s
6:00 Russia %z 2011 Mar 27 2:00s
7:00 - %z 2014 Oct 26 2:00s
6:00 - %z
# From Paul Eggert (2016-02-22):
# Asia/Barnaul covers:
@ -2862,14 +3048,14 @@ Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14
# http://publication.pravo.gov.ru/Document/View/0001201603090038
Zone Asia/Barnaul 5:35:00 - LMT 1919 Dec 10
6:00 - +06 1930 Jun 21
7:00 Russia +07/+08 1991 Mar 31 2:00s
6:00 Russia +06/+07 1992 Jan 19 2:00s
7:00 Russia +07/+08 1995 May 28
6:00 Russia +06/+07 2011 Mar 27 2:00s
7:00 - +07 2014 Oct 26 2:00s
6:00 - +06 2016 Mar 27 2:00s
7:00 - +07
6:00 - %z 1930 Jun 21
7:00 Russia %z 1991 Mar 31 2:00s
6:00 Russia %z 1992 Jan 19 2:00s
7:00 Russia %z 1995 May 28
6:00 Russia %z 2011 Mar 27 2:00s
7:00 - %z 2014 Oct 26 2:00s
6:00 - %z 2016 Mar 27 2:00s
7:00 - %z
# From Paul Eggert (2016-03-18):
# Asia/Novosibirsk covers:
@ -2883,14 +3069,14 @@ Zone Asia/Barnaul 5:35:00 - LMT 1919 Dec 10
# http://publication.pravo.gov.ru/Document/View/0001201607040064
Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00
6:00 - +06 1930 Jun 21
7:00 Russia +07/+08 1991 Mar 31 2:00s
6:00 Russia +06/+07 1992 Jan 19 2:00s
7:00 Russia +07/+08 1993 May 23 # say Shanks & P.
6:00 Russia +06/+07 2011 Mar 27 2:00s
7:00 - +07 2014 Oct 26 2:00s
6:00 - +06 2016 Jul 24 2:00s
7:00 - +07
6:00 - %z 1930 Jun 21
7:00 Russia %z 1991 Mar 31 2:00s
6:00 Russia %z 1992 Jan 19 2:00s
7:00 Russia %z 1993 May 23 # say Shanks & P.
6:00 Russia %z 2011 Mar 27 2:00s
7:00 - %z 2014 Oct 26 2:00s
6:00 - %z 2016 Jul 24 2:00s
7:00 - %z
# From Paul Eggert (2016-03-18):
# Asia/Tomsk covers:
@ -2935,14 +3121,14 @@ Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00
# http://publication.pravo.gov.ru/Document/View/0001201604260048
Zone Asia/Tomsk 5:39:51 - LMT 1919 Dec 22
6:00 - +06 1930 Jun 21
7:00 Russia +07/+08 1991 Mar 31 2:00s
6:00 Russia +06/+07 1992 Jan 19 2:00s
7:00 Russia +07/+08 2002 May 1 3:00
6:00 Russia +06/+07 2011 Mar 27 2:00s
7:00 - +07 2014 Oct 26 2:00s
6:00 - +06 2016 May 29 2:00s
7:00 - +07
6:00 - %z 1930 Jun 21
7:00 Russia %z 1991 Mar 31 2:00s
6:00 Russia %z 1992 Jan 19 2:00s
7:00 Russia %z 2002 May 1 3:00
6:00 Russia %z 2011 Mar 27 2:00s
7:00 - %z 2014 Oct 26 2:00s
6:00 - %z 2016 May 29 2:00s
7:00 - %z
# From Tim Parenti (2014-07-03):
@ -2973,12 +3159,12 @@ Zone Asia/Tomsk 5:39:51 - LMT 1919 Dec 22
# realigning itself with KRAT.
Zone Asia/Novokuznetsk 5:48:48 - LMT 1924 May 1
6:00 - +06 1930 Jun 21
7:00 Russia +07/+08 1991 Mar 31 2:00s
6:00 Russia +06/+07 1992 Jan 19 2:00s
7:00 Russia +07/+08 2010 Mar 28 2:00s
6:00 Russia +06/+07 2011 Mar 27 2:00s
7:00 - +07
6:00 - %z 1930 Jun 21
7:00 Russia %z 1991 Mar 31 2:00s
6:00 Russia %z 1992 Jan 19 2:00s
7:00 Russia %z 2010 Mar 28 2:00s
6:00 Russia %z 2011 Mar 27 2:00s
7:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
# Asia/Krasnoyarsk covers...
@ -2992,12 +3178,12 @@ Zone Asia/Novokuznetsk 5:48:48 - LMT 1924 May 1
# Byalokoz 1919 says Krasnoyarsk was 6:11:26.
Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6
6:00 - +06 1930 Jun 21
7:00 Russia +07/+08 1991 Mar 31 2:00s
6:00 Russia +06/+07 1992 Jan 19 2:00s
7:00 Russia +07/+08 2011 Mar 27 2:00s
8:00 - +08 2014 Oct 26 2:00s
7:00 - +07
6:00 - %z 1930 Jun 21
7:00 Russia %z 1991 Mar 31 2:00s
6:00 Russia %z 1992 Jan 19 2:00s
7:00 Russia %z 2011 Mar 27 2:00s
8:00 - %z 2014 Oct 26 2:00s
7:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
@ -3014,12 +3200,12 @@ Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6
Zone Asia/Irkutsk 6:57:05 - LMT 1880
6:57:05 - IMT 1920 Jan 25 # Irkutsk Mean Time
7:00 - +07 1930 Jun 21
8:00 Russia +08/+09 1991 Mar 31 2:00s
7:00 Russia +07/+08 1992 Jan 19 2:00s
8:00 Russia +08/+09 2011 Mar 27 2:00s
9:00 - +09 2014 Oct 26 2:00s
8:00 - +08
7:00 - %z 1930 Jun 21
8:00 Russia %z 1991 Mar 31 2:00s
7:00 Russia %z 1992 Jan 19 2:00s
8:00 Russia %z 2011 Mar 27 2:00s
9:00 - %z 2014 Oct 26 2:00s
8:00 - %z
# From Tim Parenti (2014-07-06):
@ -3036,13 +3222,13 @@ Zone Asia/Irkutsk 6:57:05 - LMT 1880
# http://publication.pravo.gov.ru/Document/View/0001201512300107
Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15
8:00 - +08 1930 Jun 21
9:00 Russia +09/+10 1991 Mar 31 2:00s
8:00 Russia +08/+09 1992 Jan 19 2:00s
9:00 Russia +09/+10 2011 Mar 27 2:00s
10:00 - +10 2014 Oct 26 2:00s
8:00 - +08 2016 Mar 27 2:00
9:00 - +09
8:00 - %z 1930 Jun 21
9:00 Russia %z 1991 Mar 31 2:00s
8:00 Russia %z 1992 Jan 19 2:00s
9:00 Russia %z 2011 Mar 27 2:00s
10:00 - %z 2014 Oct 26 2:00s
8:00 - %z 2016 Mar 27 2:00
9:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
@ -3082,12 +3268,12 @@ Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15
# Byalokoz 1919 says Yakutsk was 8:38:58.
Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15
8:00 - +08 1930 Jun 21
9:00 Russia +09/+10 1991 Mar 31 2:00s
8:00 Russia +08/+09 1992 Jan 19 2:00s
9:00 Russia +09/+10 2011 Mar 27 2:00s
10:00 - +10 2014 Oct 26 2:00s
9:00 - +09
8:00 - %z 1930 Jun 21
9:00 Russia %z 1991 Mar 31 2:00s
8:00 Russia %z 1992 Jan 19 2:00s
9:00 Russia %z 2011 Mar 27 2:00s
10:00 - %z 2014 Oct 26 2:00s
9:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
@ -3105,12 +3291,12 @@ Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15
# Go with Byalokoz.
Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15
9:00 - +09 1930 Jun 21
10:00 Russia +10/+11 1991 Mar 31 2:00s
9:00 Russia +09/+10 1992 Jan 19 2:00s
10:00 Russia +10/+11 2011 Mar 27 2:00s
11:00 - +11 2014 Oct 26 2:00s
10:00 - +10
9:00 - %z 1930 Jun 21
10:00 Russia %z 1991 Mar 31 2:00s
9:00 Russia %z 1992 Jan 19 2:00s
10:00 Russia %z 2011 Mar 27 2:00s
11:00 - %z 2014 Oct 26 2:00s
10:00 - %z
# From Tim Parenti (2014-07-03):
@ -3128,14 +3314,14 @@ Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15
# This transition is no doubt wrong, but we have no better info.
Zone Asia/Khandyga 9:02:13 - LMT 1919 Dec 15
8:00 - +08 1930 Jun 21
9:00 Russia +09/+10 1991 Mar 31 2:00s
8:00 Russia +08/+09 1992 Jan 19 2:00s
9:00 Russia +09/+10 2004
10:00 Russia +10/+11 2011 Mar 27 2:00s
11:00 - +11 2011 Sep 13 0:00s # Decree 725?
10:00 - +10 2014 Oct 26 2:00s
9:00 - +09
8:00 - %z 1930 Jun 21
9:00 Russia %z 1991 Mar 31 2:00s
8:00 Russia %z 1992 Jan 19 2:00s
9:00 Russia %z 2004
10:00 Russia %z 2011 Mar 27 2:00s
11:00 - %z 2011 Sep 13 0:00s # Decree 725?
10:00 - %z 2014 Oct 26 2:00s
9:00 - %z
# From Tim Parenti (2014-07-03):
@ -3151,14 +3337,14 @@ Zone Asia/Khandyga 9:02:13 - LMT 1919 Dec 15
# The Zone name should be Asia/Yuzhno-Sakhalinsk, but that's too long.
Zone Asia/Sakhalin 9:30:48 - LMT 1905 Aug 23
9:00 - +09 1945 Aug 25
11:00 Russia +11/+12 1991 Mar 31 2:00s # Sakhalin T
10:00 Russia +10/+11 1992 Jan 19 2:00s
11:00 Russia +11/+12 1997 Mar lastSun 2:00s
10:00 Russia +10/+11 2011 Mar 27 2:00s
11:00 - +11 2014 Oct 26 2:00s
10:00 - +10 2016 Mar 27 2:00s
11:00 - +11
9:00 - %z 1945 Aug 25
11:00 Russia %z 1991 Mar 31 2:00s # Sakhalin T
10:00 Russia %z 1992 Jan 19 2:00s
11:00 Russia %z 1997 Mar lastSun 2:00s
10:00 Russia %z 2011 Mar 27 2:00s
11:00 - %z 2014 Oct 26 2:00s
10:00 - %z 2016 Mar 27 2:00s
11:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
@ -3181,13 +3367,13 @@ Zone Asia/Sakhalin 9:30:48 - LMT 1905 Aug 23
# http://publication.pravo.gov.ru/Document/View/0001201604050038
Zone Asia/Magadan 10:03:12 - LMT 1924 May 2
10:00 - +10 1930 Jun 21 # Magadan Time
11:00 Russia +11/+12 1991 Mar 31 2:00s
10:00 Russia +10/+11 1992 Jan 19 2:00s
11:00 Russia +11/+12 2011 Mar 27 2:00s
12:00 - +12 2014 Oct 26 2:00s
10:00 - +10 2016 Apr 24 2:00s
11:00 - +11
10:00 - %z 1930 Jun 21 # Magadan Time
11:00 Russia %z 1991 Mar 31 2:00s
10:00 Russia %z 1992 Jan 19 2:00s
11:00 Russia %z 2011 Mar 27 2:00s
12:00 - %z 2014 Oct 26 2:00s
10:00 - %z 2016 Apr 24 2:00s
11:00 - %z
# From Tim Parenti (2014-07-06):
@ -3232,12 +3418,12 @@ Zone Asia/Magadan 10:03:12 - LMT 1924 May 2
# Go with Srednekolymsk.
Zone Asia/Srednekolymsk 10:14:52 - LMT 1924 May 2
10:00 - +10 1930 Jun 21
11:00 Russia +11/+12 1991 Mar 31 2:00s
10:00 Russia +10/+11 1992 Jan 19 2:00s
11:00 Russia +11/+12 2011 Mar 27 2:00s
12:00 - +12 2014 Oct 26 2:00s
11:00 - +11
10:00 - %z 1930 Jun 21
11:00 Russia %z 1991 Mar 31 2:00s
10:00 Russia %z 1992 Jan 19 2:00s
11:00 Russia %z 2011 Mar 27 2:00s
12:00 - %z 2014 Oct 26 2:00s
11:00 - %z
# From Tim Parenti (2014-07-03):
@ -3255,14 +3441,14 @@ Zone Asia/Srednekolymsk 10:14:52 - LMT 1924 May 2
# UTC+12 since at least then, too.
Zone Asia/Ust-Nera 9:32:54 - LMT 1919 Dec 15
8:00 - +08 1930 Jun 21
9:00 Russia +09/+10 1981 Apr 1
11:00 Russia +11/+12 1991 Mar 31 2:00s
10:00 Russia +10/+11 1992 Jan 19 2:00s
11:00 Russia +11/+12 2011 Mar 27 2:00s
12:00 - +12 2011 Sep 13 0:00s # Decree 725?
11:00 - +11 2014 Oct 26 2:00s
10:00 - +10
8:00 - %z 1930 Jun 21
9:00 Russia %z 1981 Apr 1
11:00 Russia %z 1991 Mar 31 2:00s
10:00 Russia %z 1992 Jan 19 2:00s
11:00 Russia %z 2011 Mar 27 2:00s
12:00 - %z 2011 Sep 13 0:00s # Decree 725?
11:00 - %z 2014 Oct 26 2:00s
10:00 - %z
# From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25):
@ -3275,12 +3461,12 @@ Zone Asia/Ust-Nera 9:32:54 - LMT 1919 Dec 15
# The Zone name should be Asia/Petropavlovsk-Kamchatski or perhaps
# Asia/Petropavlovsk-Kamchatsky, but these are too long.
Zone Asia/Kamchatka 10:34:36 - LMT 1922 Nov 10
11:00 - +11 1930 Jun 21
12:00 Russia +12/+13 1991 Mar 31 2:00s
11:00 Russia +11/+12 1992 Jan 19 2:00s
12:00 Russia +12/+13 2010 Mar 28 2:00s
11:00 Russia +11/+12 2011 Mar 27 2:00s
12:00 - +12
11:00 - %z 1930 Jun 21
12:00 Russia %z 1991 Mar 31 2:00s
11:00 Russia %z 1992 Jan 19 2:00s
12:00 Russia %z 2010 Mar 28 2:00s
11:00 Russia %z 2011 Mar 27 2:00s
12:00 - %z
# From Tim Parenti (2014-07-03):
@ -3288,13 +3474,13 @@ Zone Asia/Kamchatka 10:34:36 - LMT 1922 Nov 10
# 87 RU-CHU Chukotka Autonomous Okrug
Zone Asia/Anadyr 11:49:56 - LMT 1924 May 2
12:00 - +12 1930 Jun 21
13:00 Russia +13/+14 1982 Apr 1 0:00s
12:00 Russia +12/+13 1991 Mar 31 2:00s
11:00 Russia +11/+12 1992 Jan 19 2:00s
12:00 Russia +12/+13 2010 Mar 28 2:00s
11:00 Russia +11/+12 2011 Mar 27 2:00s
12:00 - +12
12:00 - %z 1930 Jun 21
13:00 Russia %z 1982 Apr 1 0:00s
12:00 Russia %z 1991 Mar 31 2:00s
11:00 Russia %z 1992 Jan 19 2:00s
12:00 Russia %z 2010 Mar 28 2:00s
11:00 Russia %z 2011 Mar 27 2:00s
12:00 - %z
# Bosnia & Herzegovina
# Croatia
@ -3413,7 +3599,7 @@ Zone Africa/Ceuta -0:21:16 - LMT 1901 Jan 1 0:00u
1:00 - CET 1986
1:00 EU CE%sT
Zone Atlantic/Canary -1:01:36 - LMT 1922 Mar # Las Palmas de Gran C.
-1:00 - -01 1946 Sep 30 1:00
-1:00 - %z 1946 Sep 30 1:00
0:00 - WET 1980 Apr 6 0:00s
0:00 1:00 WEST 1980 Sep 28 1:00u
0:00 EU WE%sT
@ -3494,8 +3680,8 @@ Zone Atlantic/Canary -1:01:36 - LMT 1922 Mar # Las Palmas de Gran C.
# but if no one is present after 11 at night, could be postponed until one
# hour before the beginning of service.
# From Paul Eggert (2013-09-11):
# Round BMT to the nearest even second, 0:29:46.
# From Paul Eggert (2024-05-24):
# Express BMT as 0:29:45.500, approximately the same precision 7° 26' 22.50".
#
# We can find no reliable source for Shanks's assertion that all of Switzerland
# except Geneva switched to Bern Mean Time at 00:00 on 1848-09-12. This book:
@ -3534,6 +3720,7 @@ Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S
Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Europe/Zurich 0:34:08 - LMT 1853 Jul 16 # See above comment.
#STDOFF 0:29:45.500
0:29:46 - BMT 1894 Jun # Bern Mean Time
1:00 Swiss CE%sT 1981
1:00 EU CE%sT
@ -3731,7 +3918,7 @@ Rule Turkey 1996 2006 - Oct lastSun 1:00s 0 -
Zone Europe/Istanbul 1:55:52 - LMT 1880
1:56:56 - IMT 1910 Oct # Istanbul Mean Time?
2:00 Turkey EE%sT 1978 Jun 29
3:00 Turkey +03/+04 1984 Nov 1 2:00
3:00 Turkey %z 1984 Nov 1 2:00
2:00 Turkey EE%sT 2007
2:00 EU EE%sT 2011 Mar 27 1:00u
2:00 - EET 2011 Mar 28 1:00u
@ -3740,7 +3927,7 @@ Zone Europe/Istanbul 1:55:52 - LMT 1880
2:00 EU EE%sT 2015 Oct 25 1:00u
2:00 1:00 EEST 2015 Nov 8 1:00u
2:00 EU EE%sT 2016 Sep 7
3:00 - +03
3:00 - %z
# Ukraine
#

30
contrib/tzdata/leap-seconds.list
View File

@ -1,5 +1,5 @@
# ATOMIC TIME.
# The Coordinated Universal Time (UTC) is the reference time scale derived
# ATOMIC TIME
# Coordinated Universal Time (UTC) is the reference time scale derived
# from The "Temps Atomique International" (TAI) calculated by the Bureau
# International des Poids et Mesures (BIPM) using a worldwide network of atomic
# clocks. UTC differs from TAI by an integer number of seconds; it is the basis
@ -8,34 +8,34 @@
#
# ASTRONOMICAL TIME (UT1) is the time scale based on the rate of rotation of the earth.
# It is now mainly derived from Very Long Baseline Interferometry (VLBI). The various
# irregular fluctuations progressively detected in the rotation rate of the Earth lead
# irregular fluctuations progressively detected in the rotation rate of the Earth led
# in 1972 to the replacement of UT1 by UTC as the reference time scale.
#
#
# LEAP SECOND
# Atomic clocks are more stable than the rate of the earth rotation since the latter
# Atomic clocks are more stable than the rate of the earth's rotation since the latter
# undergoes a full range of geophysical perturbations at various time scales: lunisolar
# and core-mantle torques, atmospheric and oceanic effetcs, etc.
# and core-mantle torques, atmospheric and oceanic effects, etc.
# Leap seconds are needed to keep the two time scales in agreement, i.e. UT1-UTC smaller
# than 0.9 second. Therefore, when necessary a "leap second" is applied to UTC.
# than 0.9 seconds. Therefore, when necessary a "leap second" is applied to UTC.
# Since the adoption of this system in 1972 it has been necessary to add a number of seconds to UTC,
# firstly due to the initial choice of the value of the second (1/86400 mean solar day of
# the year 1820) and secondly to the general slowing down of the Earth's rotation. It is
# theorically possible to have a negative leap second (a second removed from UTC), but so far,
# theoretically possible to have a negative leap second (a second removed from UTC), but so far,
# all leap seconds have been positive (a second has been added to UTC). Based on what we know about
# the earth's rotation, it is unlikely that we will ever have a negative leap second.
#
#
# HISTORY
# The first leap second was added on June 30, 1972. Until yhe year 2000, it was necessary in average to add a
# The first leap second was added on June 30, 1972. Until the year 2000, it was necessary in average to add a
# leap second at a rate of 1 to 2 years. Since the year 2000 leap seconds are introduced with an
# average interval of 3 to 4 years due to the acceleration of the Earth rotation speed.
# average interval of 3 to 4 years due to the acceleration of the Earth's rotation speed.
#
#
# RESPONSABILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
# RESPONSIBILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
# The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of
# the International Earth Rotation and reference System Service (IERS). This center is located at Paris
# Observatory. According to international agreements, leap seconds should only be scheduled for certain dates:
# Observatory. According to international agreements, leap seconds should be scheduled only for certain dates:
# first preference is given to the end of December and June, and second preference at the end of March
# and September. Since the introduction of leap seconds in 1972, only dates in June and December were used.
#
@ -60,15 +60,15 @@
#
# The following line shows the last update of this file in NTP timestamp:
#
#$ 3913697179
#$ 3929093563
#
# 2) Expiration date of the file given on a semi-annual basis: last June or last December
#
# File expires on 28 December 2024
# File expires on 28 June 2025
#
# Expire date in NTP timestamp:
#
#@ 3944332800
#@ 3960057600
#
#
# LIST OF LEAP SECONDS
@ -117,4 +117,4 @@
# please see the readme file in the 'source' directory :
# https://hpiers.obspm.fr/iers/bul/bulc/ntp/sources/README
#
#h 9dac5845 8acd32c0 2947d462 daf4a943 f58d9391
#h be738595 57b0cf1b b0218343 fb77062f 5a775e7

8
contrib/tzdata/leapseconds
View File

@ -69,11 +69,11 @@ Leap 2016 Dec 31 23:59:60 + S
# Any additional leap seconds will come after this.
# This Expires line is commented out for now,
# so that pre-2020a zic implementations do not reject this file.
#Expires 2024 Dec 28 00:00:00
#Expires 2025 Jun 28 00:00:00
# POSIX timestamps for the data in this file:
#updated 1704708379 (2024-01-08 10:06:19 UTC)
#expires 1735344000 (2024-12-28 00:00:00 UTC)
#updated 1720104763 (2024-07-04 14:52:43 UTC)
#expires 1751068800 (2025-06-28 00:00:00 UTC)
# Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)
# File expires on 28 December 2024
# File expires on 28 June 2025

145
contrib/tzdata/northamerica
View File

@ -185,26 +185,6 @@ Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
Rule US 2007 max - Nov Sun>=1 2:00 0 S
# From Arthur David Olson, 2005-12-19
# We generate the files specified below to guard against old files with
# obsolete information being left in the time zone binary directory.
# We limit the list to names that have appeared in previous versions of
# this time zone package.
# We do these as separate Zones rather than as Links to avoid problems if
# a particular place changes whether it observes DST.
# We put these specifications here in the northamerica file both to
# increase the chances that they'll actually get compiled and to
# avoid the need to duplicate the US rules in another file.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone EST -5:00 - EST
Zone MST -7:00 - MST
Zone HST -10:00 - HST
Zone EST5EDT -5:00 US E%sT
Zone CST6CDT -6:00 US C%sT
Zone MST7MDT -7:00 US M%sT
Zone PST8PDT -8:00 US P%sT
# From U. S. Naval Observatory (1989-01-19):
# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
@ -2373,6 +2353,81 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
# the researchers who prepared the Decrees page failed to find some of
# the relevant documents.
# From Heitor David Pinto (2024-08-04):
# In 1931, the decree implementing DST specified that it would take
# effect on 30 April....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1
#
# In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5
# specified that it would enter into force on 26 December 1981 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796
#
# In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that
# it would enter into force on 2 November 1982 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0
#
# Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again
# to UTC-5 on 26 October 1997 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0
#
# Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January
# 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and
# Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930,
# observed DST in 1931, and changed again to UTC-6 on 1 April 1932....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588
#
# ... the ... 10 June 1927 ... decree only said 10 June 1927, without
# specifying a time, so I suppose that it should be considered at 0:00.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920
#
# In 1942, the decree changing Baja California, Baja California Sur, Sonora,
# Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it
# would apply from 1 April, so it's unclear when the change actually
# occurred. The database currently shows 24 April 1942.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1
#
# Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ...
# 14 January 1949 ... change [to UTC-8] only occurred in Baja California.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309
#
# In 1945, the decree changing Baja California to UTC-8 specified that it
# would take effect on the third day from its publication.
# It was published on 12 November, so it would take effect on 15 November....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763
#
# In 1948, the decree changing Baja California to UTC-7 specified that it
# would take effect on "this date". The decree was made on 13 March,
# but published on 5 April, so it's unclear when the change actually occurred.
# The database currently shows 5 April 1948.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0
#
# In 1949, the decree changing Baja California to UTC-8 was published on 13
# January, but it said that it would apply from 1 January, so it's unclear when
# the change actually occurred. The database currently shows 14 January 1949.
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309
#
# Baja California also observed UTC-7 from 1 May to 24 September 1950,
# from 29 April to 30 September 1951 at 2:00,
# and from 27 April to 28 September 1952 at 2:00....
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317
# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465
#
# All changes in Baja California from 1948 to 1952 match those in California,
# on the same dates or with a difference of one day.
# So it may be easier to implement these changes as DST with rule CA
# during this whole period.
#
# From Paul Eggert (2024-08-18):
# For now, maintain the slightly-different history for Baja California,
# as we have no information on whether 1948/1952 clocks in Tijuana followed
# the decrees or followed San Diego.
# From Alan Perry (1996-02-15):
# A guy from our Mexico subsidiary finally found the Presidential Decree
# outlining the timezone changes in Mexico.
@ -2576,7 +2631,7 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
Rule Mexico 1931 only - May 1 23:00 1:00 D
Rule Mexico 1931 only - April 30 0:00 1:00 D
Rule Mexico 1931 only - Oct 1 0:00 0 S
Rule Mexico 1939 only - Feb 5 0:00 1:00 D
Rule Mexico 1939 only - Jun 25 0:00 0 S
@ -2595,14 +2650,16 @@ Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S
# Zone NAME STDOFF RULES FORMAT [UNTIL]
# Quintana Roo; represented by Cancún
Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u
-6:00 - CST 1981 Dec 23
-6:00 - CST 1981 Dec 26 2:00
-5:00 - EST 1983 Jan 4 0:00
-6:00 Mexico C%sT 1997 Oct 26 2:00
-5:00 Mexico E%sT 1998 Aug 2 2:00
-6:00 Mexico C%sT 2015 Feb 1 2:00
-5:00 - EST
# Campeche, Yucatán; represented by Mérida
Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u
-6:00 - CST 1981 Dec 23
-5:00 - EST 1982 Dec 2
-6:00 - CST 1981 Dec 26 2:00
-5:00 - EST 1982 Nov 2 2:00
-6:00 Mexico C%sT
# Coahuila, Nuevo León, Tamaulipas (near US border)
# This includes the following municipios:
@ -2619,12 +2676,15 @@ Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u
-6:00 US C%sT
# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1988
-6:00 US C%sT 1989
-6:00 Mexico C%sT
# Central Mexico
Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 Mexico C%sT 2001 Sep 30 2:00
@ -2635,7 +2695,7 @@ Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u
# Práxedis G Guerrero.
# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1996
@ -2650,7 +2710,7 @@ Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u
# Benavides.
# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1996
@ -2662,7 +2722,7 @@ Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u
-6:00 US C%sT
# Chihuahua (away from US border)
Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1996
@ -2672,23 +2732,21 @@ Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u
-6:00 - CST
# Sonora
Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1942 Apr 24
-7:00 - MST 1949 Jan 14
-8:00 - PST 1970
-7:00 - MST 1996
-7:00 Mexico M%sT 1999
-7:00 - MST
# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa
Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1942 Apr 24
-7:00 - MST 1949 Jan 14
-8:00 - PST 1970
-7:00 - MST 1970
-7:00 Mexico M%sT
# Bahía de Banderas
@ -2721,27 +2779,32 @@ Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u
# Use "Bahia_Banderas" to keep the name to fourteen characters.
Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1927 Jun 10 23:00
-7:00 - MST 1927 Jun 10
-6:00 - CST 1930 Nov 15
-7:00 Mexico M%sT 1932 Apr 1
-6:00 - CST 1942 Apr 24
-7:00 - MST 1949 Jan 14
-8:00 - PST 1970
-7:00 - MST 1970
-7:00 Mexico M%sT 2010 Apr 4 2:00
-6:00 Mexico C%sT
# Baja California
Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u
-7:00 - MST 1924
-8:00 - PST 1927 Jun 10 23:00
-8:00 - PST 1927 Jun 10
-7:00 - MST 1930 Nov 15
-8:00 - PST 1931 Apr 1
-8:00 1:00 PDT 1931 Sep 30
-8:00 - PST 1942 Apr 24
-8:00 1:00 PWT 1945 Aug 14 23:00u
-8:00 1:00 PPT 1945 Nov 12 # Peace
-8:00 1:00 PPT 1945 Nov 15 # Peace
-8:00 - PST 1948 Apr 5
-8:00 1:00 PDT 1949 Jan 14
-8:00 - PST 1950 May 1
-8:00 1:00 PDT 1950 Sep 24
-8:00 - PST 1951 Apr 29 2:00
-8:00 1:00 PDT 1951 Sep 30 2:00
-8:00 - PST 1952 Apr 27 2:00
-8:00 1:00 PDT 1952 Sep 28 2:00
-8:00 - PST 1954
-8:00 CA P%sT 1961
-8:00 - PST 1976
@ -3550,8 +3613,8 @@ Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre
-4:00 - AST 1980 May
-3:00 - -03 1987
-3:00 Canada -03/-02
-3:00 - %z 1987
-3:00 Canada %z
# Turks and Caicos
#

486
contrib/tzdata/southamerica
View File

@ -402,11 +402,11 @@ Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 -
Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May # Córdoba Mean Time
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 Arg -03/-02
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 Arg %z
#
# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
@ -421,120 +421,120 @@ Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 3
-4:00 - -04 1991 Oct 20
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 Arg -03/-02
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 3
-4:00 - %z 1991 Oct 20
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 Arg %z
#
# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 3
-4:00 - -04 1991 Oct 20
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 3
-4:00 - %z 1991 Oct 20
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# Tucumán (TM)
Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 3
-4:00 - -04 1991 Oct 20
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 Jun 1
-4:00 - -04 2004 Jun 13
-3:00 Arg -03/-02
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 3
-4:00 - %z 1991 Oct 20
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 Jun 1
-4:00 - %z 2004 Jun 13
-3:00 Arg %z
#
# La Rioja (LR)
Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 1
-4:00 - -04 1991 May 7
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 Jun 1
-4:00 - -04 2004 Jun 20
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 1
-4:00 - %z 1991 May 7
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 Jun 1
-4:00 - %z 2004 Jun 20
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# San Juan (SJ)
Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 1
-4:00 - -04 1991 May 7
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 May 31
-4:00 - -04 2004 Jul 25
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 1
-4:00 - %z 1991 May 7
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 May 31
-4:00 - %z 2004 Jul 25
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# Jujuy (JY)
Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1990 Mar 4
-4:00 - -04 1990 Oct 28
-4:00 1:00 -03 1991 Mar 17
-4:00 - -04 1991 Oct 6
-3:00 1:00 -02 1992
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1990 Mar 4
-4:00 - %z 1990 Oct 28
-4:00 1:00 %z 1991 Mar 17
-4:00 - %z 1991 Oct 6
-3:00 1:00 %z 1992
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# Catamarca (CT), Chubut (CH)
Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1991 Mar 3
-4:00 - -04 1991 Oct 20
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 Jun 1
-4:00 - -04 2004 Jun 20
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1991 Mar 3
-4:00 - %z 1991 Oct 20
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 Jun 1
-4:00 - %z 2004 Jun 20
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# Mendoza (MZ)
Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1990 Mar 4
-4:00 - -04 1990 Oct 15
-4:00 1:00 -03 1991 Mar 1
-4:00 - -04 1991 Oct 15
-4:00 1:00 -03 1992 Mar 1
-4:00 - -04 1992 Oct 18
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 May 23
-4:00 - -04 2004 Sep 26
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1990 Mar 4
-4:00 - %z 1990 Oct 15
-4:00 1:00 %z 1991 Mar 1
-4:00 - %z 1991 Oct 15
-4:00 1:00 %z 1992 Mar 1
-4:00 - %z 1992 Oct 18
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 May 23
-4:00 - %z 2004 Sep 26
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# San Luis (SL)
@ -544,53 +544,53 @@ Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 -
Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1990
-3:00 1:00 -02 1990 Mar 14
-4:00 - -04 1990 Oct 15
-4:00 1:00 -03 1991 Mar 1
-4:00 - -04 1991 Jun 1
-3:00 - -03 1999 Oct 3
-4:00 1:00 -03 2000 Mar 3
-3:00 - -03 2004 May 31
-4:00 - -04 2004 Jul 25
-3:00 Arg -03/-02 2008 Jan 21
-4:00 SanLuis -04/-03 2009 Oct 11
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1990
-3:00 1:00 %z 1990 Mar 14
-4:00 - %z 1990 Oct 15
-4:00 1:00 %z 1991 Mar 1
-4:00 - %z 1991 Jun 1
-3:00 - %z 1999 Oct 3
-4:00 1:00 %z 2000 Mar 3
-3:00 - %z 2004 May 31
-4:00 - %z 2004 Jul 25
-3:00 Arg %z 2008 Jan 21
-4:00 SanLuis %z 2009 Oct 11
-3:00 - %z
#
# Santa Cruz (SC)
Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 Jun 1
-4:00 - -04 2004 Jun 20
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 Jun 1
-4:00 - %z 2004 Jun 20
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
#
# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
#STDOFF -4:16:48.25
-4:16:48 - CMT 1920 May
-4:00 - -04 1930 Dec
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1999 Oct 3
-4:00 Arg -04/-03 2000 Mar 3
-3:00 - -03 2004 May 30
-4:00 - -04 2004 Jun 20
-3:00 Arg -03/-02 2008 Oct 18
-3:00 - -03
-4:00 - %z 1930 Dec
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1999 Oct 3
-4:00 Arg %z 2000 Mar 3
-3:00 - %z 2004 May 30
-4:00 - %z 2004 Jun 20
-3:00 Arg %z 2008 Oct 18
-3:00 - %z
# Bolivia
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/La_Paz -4:32:36 - LMT 1890
-4:32:36 - CMT 1931 Oct 15 # Calamarca MT
-4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST
-4:00 - -04
-4:00 - %z
# Brazil
@ -961,12 +961,12 @@ Rule Brazil 2018 only - Nov Sun>=1 0:00 1:00 -
#
# Fernando de Noronha (administratively part of PE)
Zone America/Noronha -2:09:40 - LMT 1914
-2:00 Brazil -02/-01 1990 Sep 17
-2:00 - -02 1999 Sep 30
-2:00 Brazil -02/-01 2000 Oct 15
-2:00 - -02 2001 Sep 13
-2:00 Brazil -02/-01 2002 Oct 1
-2:00 - -02
-2:00 Brazil %z 1990 Sep 17
-2:00 - %z 1999 Sep 30
-2:00 Brazil %z 2000 Oct 15
-2:00 - %z 2001 Sep 13
-2:00 Brazil %z 2002 Oct 1
-2:00 - %z
# Other Atlantic islands have no permanent settlement.
# These include Trindade and Martim Vaz (administratively part of ES),
# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
@ -979,119 +979,119 @@ Zone America/Noronha -2:09:40 - LMT 1914
# In the north a very small part from the river Javary (now Jari I guess,
# the border with Amapá) to the Amazon, then to the Xingu.
Zone America/Belem -3:13:56 - LMT 1914
-3:00 Brazil -03/-02 1988 Sep 12
-3:00 - -03
-3:00 Brazil %z 1988 Sep 12
-3:00 - %z
#
# west Pará (PA)
# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
Zone America/Santarem -3:38:48 - LMT 1914
-4:00 Brazil -04/-03 1988 Sep 12
-4:00 - -04 2008 Jun 24 0:00
-3:00 - -03
-4:00 Brazil %z 1988 Sep 12
-4:00 - %z 2008 Jun 24 0:00
-3:00 - %z
#
# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
# Paraíba (PB)
Zone America/Fortaleza -2:34:00 - LMT 1914
-3:00 Brazil -03/-02 1990 Sep 17
-3:00 - -03 1999 Sep 30
-3:00 Brazil -03/-02 2000 Oct 22
-3:00 - -03 2001 Sep 13
-3:00 Brazil -03/-02 2002 Oct 1
-3:00 - -03
-3:00 Brazil %z 1990 Sep 17
-3:00 - %z 1999 Sep 30
-3:00 Brazil %z 2000 Oct 22
-3:00 - %z 2001 Sep 13
-3:00 Brazil %z 2002 Oct 1
-3:00 - %z
#
# Pernambuco (PE) (except Atlantic islands)
Zone America/Recife -2:19:36 - LMT 1914
-3:00 Brazil -03/-02 1990 Sep 17
-3:00 - -03 1999 Sep 30
-3:00 Brazil -03/-02 2000 Oct 15
-3:00 - -03 2001 Sep 13
-3:00 Brazil -03/-02 2002 Oct 1
-3:00 - -03
-3:00 Brazil %z 1990 Sep 17
-3:00 - %z 1999 Sep 30
-3:00 Brazil %z 2000 Oct 15
-3:00 - %z 2001 Sep 13
-3:00 Brazil %z 2002 Oct 1
-3:00 - %z
#
# Tocantins (TO)
Zone America/Araguaina -3:12:48 - LMT 1914
-3:00 Brazil -03/-02 1990 Sep 17
-3:00 - -03 1995 Sep 14
-3:00 Brazil -03/-02 2003 Sep 24
-3:00 - -03 2012 Oct 21
-3:00 Brazil -03/-02 2013 Sep
-3:00 - -03
-3:00 Brazil %z 1990 Sep 17
-3:00 - %z 1995 Sep 14
-3:00 Brazil %z 2003 Sep 24
-3:00 - %z 2012 Oct 21
-3:00 Brazil %z 2013 Sep
-3:00 - %z
#
# Alagoas (AL), Sergipe (SE)
Zone America/Maceio -2:22:52 - LMT 1914
-3:00 Brazil -03/-02 1990 Sep 17
-3:00 - -03 1995 Oct 13
-3:00 Brazil -03/-02 1996 Sep 4
-3:00 - -03 1999 Sep 30
-3:00 Brazil -03/-02 2000 Oct 22
-3:00 - -03 2001 Sep 13
-3:00 Brazil -03/-02 2002 Oct 1
-3:00 - -03
-3:00 Brazil %z 1990 Sep 17
-3:00 - %z 1995 Oct 13
-3:00 Brazil %z 1996 Sep 4
-3:00 - %z 1999 Sep 30
-3:00 Brazil %z 2000 Oct 22
-3:00 - %z 2001 Sep 13
-3:00 Brazil %z 2002 Oct 1
-3:00 - %z
#
# Bahia (BA)
# There are too many Salvadors elsewhere, so use America/Bahia instead
# of America/Salvador.
Zone America/Bahia -2:34:04 - LMT 1914
-3:00 Brazil -03/-02 2003 Sep 24
-3:00 - -03 2011 Oct 16
-3:00 Brazil -03/-02 2012 Oct 21
-3:00 - -03
-3:00 Brazil %z 2003 Sep 24
-3:00 - %z 2011 Oct 16
-3:00 Brazil %z 2012 Oct 21
-3:00 - %z
#
# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
# Santa Catarina (SC), Rio Grande do Sul (RS)
Zone America/Sao_Paulo -3:06:28 - LMT 1914
-3:00 Brazil -03/-02 1963 Oct 23 0:00
-3:00 1:00 -02 1964
-3:00 Brazil -03/-02
-3:00 Brazil %z 1963 Oct 23 0:00
-3:00 1:00 %z 1964
-3:00 Brazil %z
#
# Mato Grosso do Sul (MS)
Zone America/Campo_Grande -3:38:28 - LMT 1914
-4:00 Brazil -04/-03
-4:00 Brazil %z
#
# Mato Grosso (MT)
Zone America/Cuiaba -3:44:20 - LMT 1914
-4:00 Brazil -04/-03 2003 Sep 24
-4:00 - -04 2004 Oct 1
-4:00 Brazil -04/-03
-4:00 Brazil %z 2003 Sep 24
-4:00 - %z 2004 Oct 1
-4:00 Brazil %z
#
# Rondônia (RO)
Zone America/Porto_Velho -4:15:36 - LMT 1914
-4:00 Brazil -04/-03 1988 Sep 12
-4:00 - -04
-4:00 Brazil %z 1988 Sep 12
-4:00 - %z
#
# Roraima (RR)
Zone America/Boa_Vista -4:02:40 - LMT 1914
-4:00 Brazil -04/-03 1988 Sep 12
-4:00 - -04 1999 Sep 30
-4:00 Brazil -04/-03 2000 Oct 15
-4:00 - -04
-4:00 Brazil %z 1988 Sep 12
-4:00 - %z 1999 Sep 30
-4:00 Brazil %z 2000 Oct 15
-4:00 - %z
#
# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
# The great circle line from Tabatinga to Porto Acre divides
# east from west Amazonas.
Zone America/Manaus -4:00:04 - LMT 1914
-4:00 Brazil -04/-03 1988 Sep 12
-4:00 - -04 1993 Sep 28
-4:00 Brazil -04/-03 1994 Sep 22
-4:00 - -04
-4:00 Brazil %z 1988 Sep 12
-4:00 - %z 1993 Sep 28
-4:00 Brazil %z 1994 Sep 22
-4:00 - %z
#
# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
# Eirunepé, Envira, Ipixuna
Zone America/Eirunepe -4:39:28 - LMT 1914
-5:00 Brazil -05/-04 1988 Sep 12
-5:00 - -05 1993 Sep 28
-5:00 Brazil -05/-04 1994 Sep 22
-5:00 - -05 2008 Jun 24 0:00
-4:00 - -04 2013 Nov 10
-5:00 - -05
-5:00 Brazil %z 1988 Sep 12
-5:00 - %z 1993 Sep 28
-5:00 Brazil %z 1994 Sep 22
-5:00 - %z 2008 Jun 24 0:00
-4:00 - %z 2013 Nov 10
-5:00 - %z
#
# Acre (AC)
Zone America/Rio_Branco -4:31:12 - LMT 1914
-5:00 Brazil -05/-04 1988 Sep 12
-5:00 - -05 2008 Jun 24 0:00
-4:00 - -04 2013 Nov 10
-5:00 - -05
-5:00 Brazil %z 1988 Sep 12
-5:00 - %z 2008 Jun 24 0:00
-4:00 - %z 2013 Nov 10
-5:00 - %z
# Chile
@ -1359,36 +1359,36 @@ Rule Chile 2023 max - Sep Sun>=2 4:00u 1:00 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Santiago -4:42:45 - LMT 1890
-4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time
-5:00 - -05 1916 Jul 1
-5:00 - %z 1916 Jul 1
-4:42:45 - SMT 1918 Sep 10
-4:00 - -04 1919 Jul 1
-4:00 - %z 1919 Jul 1
-4:42:45 - SMT 1927 Sep 1
-5:00 Chile -05/-04 1932 Sep 1
-4:00 - -04 1942 Jun 1
-5:00 - -05 1942 Aug 1
-4:00 - -04 1946 Jul 14 24:00
-4:00 1:00 -03 1946 Aug 28 24:00 # central CL
-5:00 1:00 -04 1947 Mar 31 24:00
-5:00 - -05 1947 May 21 23:00
-4:00 Chile -04/-03
-5:00 Chile %z 1932 Sep 1
-4:00 - %z 1942 Jun 1
-5:00 - %z 1942 Aug 1
-4:00 - %z 1946 Jul 14 24:00
-4:00 1:00 %z 1946 Aug 28 24:00 # central CL
-5:00 1:00 %z 1947 Mar 31 24:00
-5:00 - %z 1947 May 21 23:00
-4:00 Chile %z
Zone America/Punta_Arenas -4:43:40 - LMT 1890
-4:42:45 - SMT 1910 Jan 10
-5:00 - -05 1916 Jul 1
-5:00 - %z 1916 Jul 1
-4:42:45 - SMT 1918 Sep 10
-4:00 - -04 1919 Jul 1
-4:00 - %z 1919 Jul 1
-4:42:45 - SMT 1927 Sep 1
-5:00 Chile -05/-04 1932 Sep 1
-4:00 - -04 1942 Jun 1
-5:00 - -05 1942 Aug 1
-4:00 - -04 1946 Aug 28 24:00
-5:00 1:00 -04 1947 Mar 31 24:00
-5:00 - -05 1947 May 21 23:00
-4:00 Chile -04/-03 2016 Dec 4
-3:00 - -03
-5:00 Chile %z 1932 Sep 1
-4:00 - %z 1942 Jun 1
-5:00 - %z 1942 Aug 1
-4:00 - %z 1946 Aug 28 24:00
-5:00 1:00 %z 1947 Mar 31 24:00
-5:00 - %z 1947 May 21 23:00
-4:00 Chile %z 2016 Dec 4
-3:00 - %z
Zone Pacific/Easter -7:17:28 - LMT 1890
-7:17:28 - EMT 1932 Sep # Easter Mean Time
-7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time
-6:00 Chile -06/-05
-7:00 Chile %z 1982 Mar 14 3:00u # Easter Time
-6:00 Chile %z
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
@ -1408,10 +1408,10 @@ Zone Pacific/Easter -7:17:28 - LMT 1890
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Palmer 0 - -00 1965
-4:00 Arg -04/-03 1969 Oct 5
-3:00 Arg -03/-02 1982 May
-4:00 Chile -04/-03 2016 Dec 4
-3:00 - -03
-4:00 Arg %z 1969 Oct 5
-3:00 Arg %z 1982 May
-4:00 Chile %z 2016 Dec 4
-3:00 - %z
# Colombia
@ -1430,7 +1430,7 @@ Rule CO 1993 only - Feb 6 24:00 0 -
#STDOFF -4:56:16.4
Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
-4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
-5:00 CO -05/-04
-5:00 CO %z
# Malpelo, Providencia, San Andres
# no information; probably like America/Bogota
@ -1461,10 +1461,10 @@ Rule Ecuador 1993 only - Feb 5 0:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Guayaquil -5:19:20 - LMT 1890
-5:14:00 - QMT 1931 # Quito Mean Time
-5:00 Ecuador -05/-04
-5:00 Ecuador %z
Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
-5:00 - -05 1986
-6:00 Ecuador -06/-05
-5:00 - %z 1986
-6:00 Ecuador %z
# Falklands
@ -1564,10 +1564,10 @@ Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Atlantic/Stanley -3:51:24 - LMT 1890
-3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
-4:00 Falk -04/-03 1983 May
-3:00 Falk -03/-02 1985 Sep 15
-4:00 Falk -04/-03 2010 Sep 5 2:00
-3:00 - -03
-4:00 Falk %z 1983 May
-3:00 Falk %z 1985 Sep 15
-4:00 Falk %z 2010 Sep 5 2:00
-3:00 - %z
# French Guiana
# For the 1911/1912 establishment of standard time in French possessions, see:
@ -1575,8 +1575,8 @@ Zone Atlantic/Stanley -3:51:24 - LMT 1890
# page 752, 18b.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1
-4:00 - -04 1967 Oct
-3:00 - -03
-4:00 - %z 1967 Oct
-3:00 - %z
# Guyana
@ -1610,10 +1610,10 @@ Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown
-4:00 - -04 1915 Mar 1
-3:45 - -0345 1975 Aug 1
-3:00 - -03 1992 Mar 29 1:00
-4:00 - -04
-4:00 - %z 1915 Mar 1
-3:45 - %z 1975 Aug 1
-3:00 - %z 1992 Mar 29 1:00
-4:00 - %z
# Paraguay
#
@ -1711,9 +1711,9 @@ Rule Para 2013 max - Mar Sun>=22 0:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Asuncion -3:50:40 - LMT 1890
-3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
-4:00 - -04 1972 Oct
-3:00 - -03 1974 Apr
-4:00 Para -04/-03
-4:00 - %z 1972 Oct
-3:00 - %z 1974 Apr
-4:00 Para %z
# Peru
#
@ -1740,12 +1740,12 @@ Rule Peru 1994 only - Apr 1 0:00 0 -
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Lima -5:08:12 - LMT 1890
-5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
-5:00 Peru -05/-04
-5:00 Peru %z
# South Georgia
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
-2:00 - -02
-2:00 - %z
# South Sandwich Is
# uninhabited; scientific personnel have wintered
@ -1755,8 +1755,8 @@ Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
Zone America/Paramaribo -3:40:40 - LMT 1911
-3:40:52 - PMT 1935 # Paramaribo Mean Time
-3:40:36 - PMT 1945 Oct # The capital moved?
-3:30 - -0330 1984 Oct
-3:00 - -03
-3:30 - %z 1984 Oct
-3:00 - %z
# Uruguay
# From Paul Eggert (1993-11-18):
@ -1971,15 +1971,15 @@ Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 -
# This Zone can be simplified once we assume zic %z.
Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10
-3:44:51 - MMT 1920 May 1 # Montevideo MT
-4:00 - -04 1923 Oct 1
-3:30 Uruguay -0330/-03 1942 Dec 14
-3:00 Uruguay -03/-0230 1960
-3:00 Uruguay -03/-02 1968
-3:00 Uruguay -03/-0230 1970
-3:00 Uruguay -03/-02 1974
-3:00 Uruguay -03/-0130 1974 Mar 10
-3:00 Uruguay -03/-0230 1974 Dec 22
-3:00 Uruguay -03/-02
-4:00 - %z 1923 Oct 1
-3:30 Uruguay %z 1942 Dec 14
-3:00 Uruguay %z 1960
-3:00 Uruguay %z 1968
-3:00 Uruguay %z 1970
-3:00 Uruguay %z 1974
-3:00 Uruguay %z 1974 Mar 10
-3:00 Uruguay %z 1974 Dec 22
-3:00 Uruguay %z
# Venezuela
#
@ -2013,7 +2013,7 @@ Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Caracas -4:27:44 - LMT 1890
-4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
-4:30 - -0430 1965 Jan 1 0:00
-4:00 - -04 2007 Dec 9 3:00
-4:30 - -0430 2016 May 1 2:30
-4:00 - -04
-4:30 - %z 1965 Jan 1 0:00
-4:00 - %z 2007 Dec 9 3:00
-4:30 - %z 2016 May 1 2:30
-4:00 - %z

214
contrib/tzdata/theory.html
View File

@ -89,13 +89,15 @@ The <code><abbr>tz</abbr></code> code is upwards compatible with <a
href="https://en.wikipedia.org/wiki/POSIX">POSIX</a>, an international
standard for <a
href="https://en.wikipedia.org/wiki/Unix">UNIX</a>-like systems.
As of this writing, the current edition of POSIX is: <a
As of this writing, the current edition of POSIX is POSIX.1-2024,
which has been published but not yet in HTML form.
Unlike its predecessor POSIX.1-2017 (<a
href="https://pubs.opengroup.org/onlinepubs/9699919799/"> The Open
Group Base Specifications Issue 7</a>, IEEE Std 1003.1-2017, 2018
Edition.
Because the database's scope encompasses real-world changes to civil
timekeeping, its model for describing time is more complex than the
standard and daylight saving times supported by POSIX.1-2017.
Edition), POSIX.1-2024 requires support for the
<code><abbr>tz</abbr></code> database, which has a
model for describing civil time that is more complex than the
standard and daylight saving times required by POSIX.1-2017.
A <code><abbr>tz</abbr></code> timezone corresponds to a ruleset that can
have more than two changes per year, these changes need not merely
flip back and forth between two alternatives, and the rules themselves
@ -159,7 +161,7 @@ among the following goals:
</ul>
<p>
Names normally have the form
Names normally have the format
<var>AREA</var><code>/</code><var>LOCATION</var>, where
<var>AREA</var> is a continent or ocean, and
<var>LOCATION</var> is a specific location within the area.
@ -187,7 +189,7 @@ in decreasing order of importance:
href="https://en.wikipedia.org/wiki/ASCII">ASCII</a> letters,
'<code>.</code>', '<code>-</code>' and '<code>_</code>'.
Do not use digits, as that might create an ambiguity with <a
href="https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03">POSIX.1-2017
href="https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03">POSIX's proleptic
<code>TZ</code> strings</a>.
A file name component must not exceed 14 characters or start with
'<code>-</code>'.
@ -378,7 +380,8 @@ nowadays distributions typically use it
and no great weight should be attached to whether a link
is defined in <code>backward</code> or in some other file.
The source file <code>etcetera</code> defines names that may be useful
on platforms that do not support POSIX.1-2017-style <code>TZ</code> strings;
on platforms that do not support proleptic <code>TZ</code> strings
like <code>&lt;+08&gt;-8</code>;
no other source file other than <code>backward</code>
contains links to its zones.
One of <code>etcetera</code>'s names is <code>Etc/UTC</code>,
@ -425,8 +428,8 @@ in decreasing order of importance:
In other words, in the C locale the POSIX extended regular
expression <code>[-+[:alnum:]]{3,6}</code> should match the
abbreviation.
This guarantees that all abbreviations could have been specified by a
POSIX.1-2017 <code>TZ</code> string.
This guarantees that all abbreviations could have been specified
explicitly by a POSIX proleptic <code>TZ</code> string.
</p>
</li>
<li>
@ -578,6 +581,11 @@ in decreasing order of importance:
some sense undefined; this notation is derived
from <a href="https://datatracker.ietf.org/doc/html/rfc3339">Internet
<abbr title="Request For Comments">RFC</abbr> 3339</a>.
(The abbreviation 'Z' that
<a href="https://datatracker.ietf.org/doc/html/rfc9557">Internet
<abbr>RFC</abbr> 9557</a> uses for this concept
would violate the POSIX requirement
of at least three characters in an abbreviation.)
</li>
</ul>
@ -775,7 +783,7 @@ href="https://www.dissentmagazine.org/blog/booked-a-global-history-of-time-vanes
the Western 06:00 to be 12:00. These practices are largely outside
the scope of the <code><abbr>tz</abbr></code> code and data, which
provide only limited support for date and time localization
such as that required by POSIX.1-2017.
such as that required by POSIX.
If <abbr>DST</abbr> is not used a different time zone
can often do the trick; for example, in Kenya a <code>TZ</code> setting
like <code>&lt;-03&gt;3</code> or <code>America/Cayenne</code> starts
@ -866,29 +874,62 @@ Code compatible with this package is already
<a href="tz-link.html#tzdb">part of many platforms</a>, where the
primary use of this package is to update obsolete time-related files.
To do this, you may need to compile the time zone compiler
'<code>zic</code>' supplied with this package instead of using the
system '<code>zic</code>', since the format of <code>zic</code>'s
<code>zic</code> supplied with this package instead of using the
system <code>zic</code>, since the format of <code>zic</code>'s
input is occasionally extended, and a platform may still be shipping
an older <code>zic</code>.
</p>
<h3 id="POSIX">POSIX.1-2017 properties and limitations</h3>
<p>
In POSIX, time display in a process is controlled by the
environment variable <code>TZ</code>, which can have two forms:
</p>
<ul>
<li>
A <dfn>proleptic <code>TZ</code></dfn> value
like <code>CET-1CEST,M3.5.0,M10.5.0/3</code> uses a complex
notation that specifies a single standard time along with daylight
saving rules that apply to all years past, present, and future.
</li>
<li>
A <dfn>geographical <code>TZ</code></dfn> value
like <code>Europe/Berlin</code> names a location that stands for
civil time near that location, which can have more than
one standard time and more than one set of daylight saving rules,
to record timekeeping practice more accurately.
These names are defined by the <code><abbr>tz</abbr></code> database.
</li>
</ul>
<h3 id="POSIX.1-2017">POSIX.1-2017 properties and limitations</h3>
<p>
Some platforms support only the features required by POSIX.1-2017,
and have not yet upgraded to POSIX.1-2024.
Code intended to be portable to these platforms must deal
with problems that were fixed in later POSIX editions.
</p>
<ul>
<li>
POSIX.1-2017 does not require support for geographical <code>TZ</code>,
and there is no convenient and efficient way to determine
the <abbr>UT</abbr> offset and time zone abbreviation of arbitrary
timestamps, particularly for timezones
that do not fit into the POSIX model.
</li>
<li>
<p>
In POSIX.1-2017, time display in a process is controlled by the
environment variable <code>TZ</code>.
Unfortunately, the POSIX.1-2017
<code>TZ</code> string takes a form that is hard to describe and
is error-prone in practice.
Also, POSIX.1-2017 <code>TZ</code> strings cannot deal with daylight
The proleptic <code>TZ</code> string,
which is all that POSIX.1-2017 requires,
has a format that is hard to describe and is error-prone in practice.
Also, proleptic <code>TZ</code> strings cannot deal with daylight
saving time rules not based on the Gregorian calendar (as in
Morocco), or with situations where more than two time zone
abbreviations or <abbr>UT</abbr> offsets are used in an area.
</p>
<p>
The POSIX.1-2017 <code>TZ</code> string takes the following form:
A proleptic <code>TZ</code> string has the following format:
</p>
<p>
@ -955,7 +996,7 @@ an older <code>zic</code>.
</dl>
<p>
Here is an example POSIX.1-2017 <code>TZ</code> string for New
Here is an example proleptic <code>TZ</code> string for New
Zealand after 2007.
It says that standard time (<abbr>NZST</abbr>) is 12 hours ahead
of <abbr>UT</abbr>, and that daylight saving time
@ -966,26 +1007,46 @@ an older <code>zic</code>.
<pre><code>TZ='NZST-12NZDT,M9.5.0,M4.1.0/3'</code></pre>
<p>
This POSIX.1-2017 <code>TZ</code> string is hard to remember, and
This proleptic <code>TZ</code> string is hard to remember, and
mishandles some timestamps before 2008.
With this package you can use this instead:
With this package you can use a geographical <code>TZ</code> instead:
</p>
<pre><code>TZ='Pacific/Auckland'</code></pre>
</li>
</ul>
<p>
POSIX.1-2017 also has the limitations of POSIX.1-2024,
discussed in the next section.
</p>
<h3 id="POSIX.1-2024">POSIX.1-2024 properties and limitations</h3>
<p>
POSIX.1-2024 extends POSIX.1-2017 in the following significant ways:
</p>
<ul>
<li>
POSIX does not define the <abbr>DST</abbr> transitions
for <code>TZ</code> values like
"<code>EST5EDT</code>".
Traditionally the current <abbr>US</abbr> <abbr>DST</abbr> rules
were used to interpret such values, but this meant that the
<abbr>US</abbr> <abbr>DST</abbr> rules were compiled into each
time conversion package, and when
<abbr>US</abbr> time conversion rules changed (as in the United
States in 1987 and again in 2007), all packages that
interpreted <code>TZ</code> values had to be updated
to ensure proper results.
POSIX.1-2024 requires support for geographical <code>TZ</code>.
Earlier POSIX editions require support only for proleptic <code>TZ</code>.
</li>
<li>
POSIX.1-2024 requires <code>struct tm</code>
to have a <abbr>UT</abbr> offset member <code>tm_gmtoff</code>
and a time zone abbreviation member <code>tm_zone</code>.
Earlier POSIX editions lack this requirement.
</li>
<li>
DST transition times can range from &minus;167:59:59
to 167:59:59 instead of merely from 00:00:00 to 24:59:59.
This allows for proleptic TZ strings
like <code>"&lt;-02&gt;2&lt;-01&gt;,M3.5.0/-1,M10.5.0/0"</code>
where the transition time &minus;1:00 means 23:00 the previous day.
</li>
</ul>
<p>
However POSIX.1-2024, like earlier POSIX editions, has some limitations:
<ul>
<li>
The <code>TZ</code> environment variable is process-global, which
makes it hard to write efficient, thread-safe applications that
@ -1003,16 +1064,34 @@ an older <code>zic</code>.
handling daylight saving time shifts &ndash; as might be required to
limit phone calls to off-peak hours.
</li>
<li>
POSIX.1-2017 provides no convenient and efficient way to determine
the <abbr>UT</abbr> offset and time zone abbreviation of arbitrary
timestamps, particularly for timezones
that do not fit into the POSIX model.
</li>
<li>
POSIX requires that <code>time_t</code> clock counts exclude leap
seconds.
</li>
<li>
POSIX does not define the <abbr>DST</abbr> transitions
for <code>TZ</code> values like
"<code>EST5EDT</code>".
Traditionally the current <abbr>US</abbr> <abbr>DST</abbr> rules
were used to interpret such values, but this meant that the
<abbr>US</abbr> <abbr>DST</abbr> rules were compiled into each
time conversion package, and when
<abbr>US</abbr> time conversion rules changed (as in the United
States in 1987 and again in 2007), all packages that
interpreted <code>TZ</code> values had to be updated
to ensure proper results.
</li>
</ul>
<h3 id="POSIX-extensions">Extensions to POSIX in the
<code><abbr>tz</abbr></code> code</h3>
<p>
The <code><abbr>tz</abbr></code> code defines some properties
left unspecified by POSIX, and attempts to support some
extensions to POSIX.
</p>
<ul>
<li>
The <code><abbr>tz</abbr></code> code attempts to support all the
<code>time_t</code> implementations allowed by POSIX.
@ -1026,21 +1105,14 @@ an older <code>zic</code>.
and 40-bit integers are also used occasionally.
Although earlier POSIX versions allowed <code>time_t</code> to be a
floating-point type, this was not supported by any practical system,
and POSIX.1-2013 and the <code><abbr>tz</abbr></code> code both
and POSIX.1-2013+ and the <code><abbr>tz</abbr></code> code both
require <code>time_t</code> to be an integer type.
</li>
</ul>
<h3 id="POSIX-extensions">Extensions to POSIX.1-2017 in the
<code><abbr>tz</abbr></code> code</h3>
<ul>
<li>
<p>
The <code>TZ</code> environment variable is used in generating
the name of a file from which time-related information is read
(or is interpreted à la POSIX.1-2017); <code>TZ</code> is no longer
constrained to be a string containing abbreviations
and numeric data as described <a href="#POSIX">above</a>.
If the <code>TZ</code> environment variable uses the geographical format,
it is used in generating
the name of a file from which time-related information is read.
The file's format is <dfn><abbr>TZif</abbr></dfn>,
a timezone information format that contains binary data; see
<a href="https://datatracker.ietf.org/doc/html/8536">Internet
@ -1053,10 +1125,11 @@ an older <code>zic</code>.
abbreviations are used.
</p>
<p>
It was recognized that allowing the <code>TZ</code> environment
When the <code><abbr>tz</abbr></code> code was developed in the 1980s,
it was recognized that allowing the <code>TZ</code> environment
variable to take on values such as '<code>America/New_York</code>'
might cause "old" programs (that expect <code>TZ</code> to have a
certain form) to operate incorrectly; consideration was given to using
certain format) to operate incorrectly; consideration was given to using
some other environment variable (for example, <code>TIMEZONE</code>)
to hold the string used to generate the <abbr>TZif</abbr> file's name.
In the end, however, it was decided to continue using
@ -1069,15 +1142,6 @@ an older <code>zic</code>.
assume pre-POSIX <code>TZ</code> values.
</p>
</li>
<li>
The code supports platforms with a <abbr>UT</abbr> offset member
in <code>struct tm</code>, e.g., <code>tm_gmtoff</code>,
or with a time zone abbreviation member in
<code>struct tm</code>, e.g., <code>tm_zone</code>. As noted
in <a href="https://austingroupbugs.net/view.php?id=1533">Austin
Group defect 1533</a>, a future version of POSIX is planned to
require <code>tm_gmtoff</code> and <code>tm_zone</code>.
</li>
<li>
Functions <code>tzalloc</code>, <code>tzfree</code>,
<code>localtime_rz</code>, and <code>mktime_z</code> for
@ -1088,7 +1152,7 @@ an older <code>zic</code>.
and <code>localtime_rz</code> and <code>mktime_z</code> are
like <code>localtime_r</code> and <code>mktime</code> with an
extra <code>timezone_t</code> argument.
The functions were inspired by <a href="https://netbsd.org/">NetBSD</a>.
The functions were inspired by <a href="https://netbsd.org">NetBSD</a>.
</li>
<li>
Negative <code>time_t</code> values are supported, on systems
@ -1116,6 +1180,7 @@ The vestigial <abbr>API</abbr>s are:
<li>
The POSIX <code>tzname</code> variable does not suffice and is no
longer needed.
It is planned to be removed in a future edition of POSIX.
To get a timestamp's time zone abbreviation, consult
the <code>tm_zone</code> member if available; otherwise,
use <code>strftime</code>'s <code>"%Z"</code> conversion
@ -1124,6 +1189,7 @@ The vestigial <abbr>API</abbr>s are:
<li>
The POSIX <code>daylight</code> and <code>timezone</code>
variables do not suffice and are no longer needed.
They are planned to be removed in a future edition of POSIX.
To get a timestamp's <abbr>UT</abbr> offset, consult
the <code>tm_gmtoff</code> member if available; otherwise,
subtract values returned by <code>localtime</code>
@ -1278,13 +1344,13 @@ between now and the future time.
<p>
Leap seconds were introduced in 1972 to accommodate the
difference between atomic time and the less regular rotation of the earth.
Unfortunately they caused so many problems with civil
timekeeping that they
are <a href="https://www.bipm.org/en/cgpm-2022/resolution-4">planned
to be discontinued by 2035</a>, with some as-yet-undetermined
mechanism replacing them, perhaps after the year 2135.
Despite their impending obsolescence, a record of leap seconds is still
needed to resolve timestamps from 1972 through 2035.
Unfortunately they have caused so many problems with civil
timekeeping that there are
<a href="https://www.bipm.org/en/cgpm-2022/resolution-4">plans
to discontinue them by 2035</a>.
Even if these plans come to fruition, a record of leap seconds will still be
needed to resolve timestamps from 1972 through 2035,
and there may also be a need to record whatever mechanism replaces them.
</p>
<p>
@ -1374,6 +1440,12 @@ href='https://www.esa.int/Applications/Navigation/Telling_time_on_the_Moon'>cons
the establishment of a reference timescale for the Moon, which has
days roughly equivalent to 29.5 Earth days, and where relativistic
effects cause clocks to tick slightly faster than on Earth.
Also, <abbr title="National Aeronautics and Space Administration">NASA</abbr>
has been <a
href='https://www.whitehouse.gov/wp-content/uploads/2024/04/Celestial-Time-Standardization-Policy.pdf'>ordered</a>
to consider the establishment of Coordinated Lunar Time (<abbr>LTC</abbr>).
It is not yet known whether the US and European efforts will result in
multiple timescales on the Moon.
</p>
<p>

2
contrib/tzdata/version
View File

@ -1 +1 @@
2024a
2024b

32
contrib/tzdata/ziguard.awk
View File

@ -5,14 +5,10 @@
# This is not a general-purpose converter; it is designed for current tzdata.
# It just converts from current source to main, vanguard, and rearguard forms.
# Although it might be nice for it to be idempotent, or to be useful
# for converting back and forth between vanguard and rearguard formats,
# for converting back and forth between formats,
# it does not do these nonessential tasks now.
#
# Although main and vanguard forms are currently equivalent,
# this need not always be the case. When the two forms differ,
# this script can convert either from main to vanguard form (needed then),
# or from vanguard to main form (this conversion would be needed later,
# after main became rearguard and vanguard became main).
# This script can convert from main to vanguard form and vice versa.
# There is no need to convert rearguard to other forms.
#
# When converting to vanguard form, the output can use the line
@ -145,12 +141,12 @@ DATAFORM != "main" {
}
# If this line should differ due to Portugal benefiting from %z if supported,
# uncomment the desired version and comment out the undesired one.
if ($0 ~ /^#?[\t ]+-[12]:00[\t ]+Port[\t ]+[%+-]/) {
if (($0 ~ /%z/) == (DATAFORM == "vanguard")) {
uncomment = in_comment
} else {
# comment out the undesired version and uncomment the desired one.
if ($0 ~ /^#?[\t ]+-[12]:00[\t ]+((Port|W-Eur)[\t ]+[%+-]|-[\t ]+(%z|-01)[\t ]+1982 Mar 28)/) {
if (($0 ~ /%z/) == (DATAFORM == "rearguard")) {
comment_out = !in_comment
} else {
uncomment = in_comment
}
}
@ -172,13 +168,8 @@ DATAFORM != "main" {
sub(/^/, "#")
}
# Prefer %z in vanguard form, explicit abbreviations otherwise.
if (DATAFORM == "vanguard") {
sub(/^(Zone[\t ]+[^\t ]+)?[\t ]+[^\t ]+[\t ]+[^\t ]+[\t ]+[-+][^\t ]+/, \
"&CHANGE-TO-%z")
sub(/-00CHANGE-TO-%z/, "-00")
sub(/[-+][^\t ]+CHANGE-TO-/, "")
} else {
# Prefer explicit abbreviations in rearguard form, %z otherwise.
if (DATAFORM == "rearguard") {
if ($0 ~ /^[^#]*%z/) {
stdoff_column = 2 * ($0 ~ /^Zone/) + 1
rules_column = stdoff_column + 1
@ -216,6 +207,11 @@ DATAFORM != "main" {
}
sub(/%z/, abbr)
}
} else {
sub(/^(Zone[\t ]+[^\t ]+)?[\t ]+[^\t ]+[\t ]+[^\t ]+[\t ]+[-+][^\t ]+/, \
"&CHANGE-TO-%z")
sub(/-00CHANGE-TO-%z/, "-00")
sub(/[-+][^\t ]+CHANGE-TO-/, "")
}
# Normally, prefer whole seconds. However, prefer subseconds

3
contrib/tzdata/zone.tab
View File

@ -264,8 +264,7 @@ MK +4159+02126 Europe/Skopje
ML +1239-00800 Africa/Bamako
MM +1647+09610 Asia/Yangon
MN +4755+10653 Asia/Ulaanbaatar most of Mongolia
MN +4801+09139 Asia/Hovd Bayan-Olgiy, Govi-Altai, Hovd, Uvs, Zavkhan
MN +4804+11430 Asia/Choibalsan Dornod, Sukhbaatar
MN +4801+09139 Asia/Hovd Bayan-Olgii, Hovd, Uvs
MO +221150+1133230 Asia/Macau
MP +1512+14545 Pacific/Saipan
MQ +1436-06105 America/Martinique

3
contrib/tzdata/zone1970.tab
View File

@ -210,8 +210,7 @@ MD +4700+02850 Europe/Chisinau
MH +0905+16720 Pacific/Kwajalein Kwajalein
MM,CC +1647+09610 Asia/Yangon
MN +4755+10653 Asia/Ulaanbaatar most of Mongolia
MN +4801+09139 Asia/Hovd Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan
MN +4804+11430 Asia/Choibalsan Dornod, Sükhbaatar
MN +4801+09139 Asia/Hovd Bayan-Ölgii, Hovd, Uvs
MO +221150+1133230 Asia/Macau
MQ +1436-06105 America/Martinique
MT +3554+01431 Europe/Malta

8
contrib/tzdata/zonenow.tab
View File

@ -5,7 +5,7 @@
# From Paul Eggert (2023-12-18):
# This file contains a table where each row stands for a timezone
# where civil timestamps are predicted to agree from now on.
# This file is like zone1970.tab (see zone1970.tab's coments),
# This file is like zone1970.tab (see zone1970.tab's comments),
# but with the following changes:
#
# 1. Each timezone corresponds to a set of clocks that are planned
@ -123,8 +123,6 @@ XX +1455-02331 Atlantic/Cape_Verde Cape Verde
#
# -01/+00 (EU DST)
XX +3744-02540 Atlantic/Azores Azores
# -01/+00 (EU DST) until 2024-03-31; then -02/-01 (EU DST)
XX +7029-02158 America/Scoresbysund Ittoqqortoormiit
#
# +00 - GMT
XX +0519-00402 Africa/Abidjan far western Africa; Iceland ("GMT")
@ -199,7 +197,7 @@ XX +2518+05518 Asia/Dubai Russia; Caucasus; Persian Gulf; Seychelles; Réunion
XX +3431+06912 Asia/Kabul Afghanistan
#
# +05
XX +4120+06918 Asia/Tashkent Russia; west Kazakhstan; Tajikistan; Turkmenistan; Uzbekistan; Maldives
XX +4120+06918 Asia/Tashkent Russia; Kazakhstan; Tajikistan; Turkmenistan; Uzbekistan; Maldives
#
# +05 - PKT
XX +2452+06703 Asia/Karachi Pakistan ("PKT")
@ -215,8 +213,6 @@ XX +2743+08519 Asia/Kathmandu Nepal
#
# +06
XX +2343+09025 Asia/Dhaka Russia; Kyrgyzstan; Bhutan; Bangladesh; Chagos
# +06 until 2024-03-01; then +05
XX +4315+07657 Asia/Almaty Kazakhstan (except western areas)
#
# +06:30
XX +1647+09610 Asia/Yangon Myanmar; Cocos