Commit a5725262 authored by Philip Paeps's avatar Philip Paeps
Browse files

Import tzdata 2021b

parent 4cd7e107
......@@ -26,8 +26,11 @@ to work well. Additions to data should contain commentary citing
reliable sources as justification. Citations should use https: URLs
if available.
For changes that fix sensitive security-related bugs, please see the
file SECURITY.
Please submit changes against either the latest release in
<https://www.iana.org/time-zones> or the master branch of the development
<https://www.iana.org/time-zones> or the main branch of the development
repository. The latter is preferred. If you use Git the following
workflow may be helpful:
......@@ -36,9 +39,9 @@ workflow may be helpful:
git clone https://github.com/eggert/tz.git
cd tz
* Get current with the master branch.
* Get current with the main branch.
git checkout master
git checkout main
git pull
* Switch to a new branch for the changes. Choose a different
......@@ -70,17 +73,17 @@ workflow may be helpful:
* Create patch files 0001-*, 0002-*, ...
git format-patch master
git format-patch main
* After reviewing the patch files, send the patches to tz@iana.org
for others to review.
git send-email master
git send-email main
For an archived example of such an email, see
<https://mm.icann.org/pipermail/tz/2018-February/026122.html>.
* Start anew by getting current with the master branch again
* Start anew by getting current with the main branch again
(the second step above).
Please do not create issues or pull requests on GitHub, as the
......
......@@ -45,9 +45,9 @@ LOCALTIME= GMT
#
# Any other value for POSIXRULES is obsolete and should not be relied on, as:
# * It does not work correctly in popular implementations such as GNU/Linux.
# * It does not work in the tzdb implementation for timestamps after 2037.
# * It is incompatible with 'zic -b slim' if POSIXRULES specifies transitions
# at standard time or UT rather than at local time.
# * It does not work even in tzcode, except for historical timestamps
# that precede the last explicit transition in the POSIXRULES file.
# Hence it typically does not work for current and future timestamps.
# In short, software should avoid ruleless settings like TZ='EET-2EEST'
# and so should not depend on the value of POSIXRULES.
#
......@@ -122,8 +122,8 @@ 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 = int64_t
TIME_T_ALTERNATIVES_TAIL = int32_t uint32_t uint64_t
TIME_T_ALTERNATIVES_HEAD = int_least64_t
TIME_T_ALTERNATIVES_TAIL = int_least32_t uint_least32_t uint_least64_t
# What kind of TZif data files to generate. (TZif is the binary time
# zone data format that zic generates; see Internet RFC 8536.)
......@@ -152,8 +152,10 @@ REDO= posix_right
# The EXPIRES_LINE value matters only if REDO's value contains "right".
# If you change EXPIRES_LINE, remove the leapseconds file before running "make".
# zic's support for the Expires line was introduced in tzdb 2020a,
# and EXPIRES_LINE defaults to 0 for now so that the leapseconds file
# can be given to older zic implementations.
# and was modified in tzdb 2021b to generate version 4 TZif files.
# EXPIRES_LINE defaults to 0 for now so that the leapseconds file
# can be given to pre-2020a zic implementations and so that TZif files
# built by newer zic implementations can be read by pre-2021b libraries.
EXPIRES_LINE= 0
# To install data in text form that has all the information of the TZif data,
......@@ -210,6 +212,7 @@ LDLIBS=
# -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function
# -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
# localtime_rz can make zdump significantly faster, but is nonstandard.
# -DHAVE_MALLOC_ERRNO=0 if malloc etc. do not set errno on failure.
# -DHAVE_POSIX_DECLS=0 if your system's include files do not declare
# functions like 'link' or variables like 'tzname' required by POSIX
# -DHAVE_SNPRINTF=0 if your system lacks the snprintf function
......@@ -220,7 +223,6 @@ LDLIBS=
# -DHAVE_STRTOLL=0 if your system lacks the strtoll function
# -DHAVE_SYMLINK=0 if your system lacks the symlink function
# -DHAVE_SYS_STAT_H=0 if your compiler lacks a <sys/stat.h>
# -DHAVE_SYS_WAIT_H=0 if your compiler lacks a <sys/wait.h>
# -DHAVE_TZSET=0 if your system lacks a tzset function
# -DHAVE_UNISTD_H=0 if your compiler lacks a <unistd.h>
# -Dlocale_t=XXX if your system uses XXX instead of locale_t
......@@ -257,22 +259,26 @@ LDLIBS=
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_INSTRUMENT) \
-Wall -Wextra \
-Walloc-size-larger-than=100000 -Warray-bounds=2 \
-Wbad-function-cast -Wcast-align=strict -Wdate-time \
-Wdeclaration-after-statement -Wdouble-promotion \
-Wduplicated-branches -Wduplicated-cond \
-Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
-Winit-self -Wjump-misses-init -Wlogical-op \
-Winit-self -Wlogical-op \
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
-Wnull-dereference \
-Wold-style-definition -Woverlength-strings -Wpointer-arith \
-Wshadow -Wshift-overflow=2 -Wstrict-prototypes -Wstringop-overflow=4 \
-Wshadow -Wshift-overflow=2 -Wstrict-overflow \
-Wstrict-prototypes -Wstringop-overflow=4 \
-Wstringop-truncation -Wsuggest-attribute=cold \
-Wsuggest-attribute=const -Wsuggest-attribute=format \
-Wsuggest-attribute=malloc \
-Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
-Wtrampolines -Wundef -Wuninitialized -Wunused \
-Wtrampolines -Wundef -Wuninitialized -Wunused-macros \
-Wvariadic-macros -Wvla -Wwrite-strings \
-Wno-address -Wno-format-nonliteral -Wno-sign-compare \
-Wno-type-limits -Wno-unused-parameter
......@@ -523,7 +529,7 @@ TZS_YEAR= 2050
TZS_CUTOFF_FLAG= -c $(TZS_YEAR)
TZS= to$(TZS_YEAR).tzs
TZS_NEW= to$(TZS_YEAR)new.tzs
TZS_DEPS= $(PRIMARY_YDATA) asctime.c localtime.c \
TZS_DEPS= $(YDATA) asctime.c localtime.c \
private.h tzfile.h zdump.c zic.c
# EIGHT_YARDS is just a yard short of the whole ENCHILADA.
EIGHT_YARDS = $(COMMON) $(DOCS) $(SOURCES) $(DATA) $(MISC) tzdata.zi
......@@ -796,9 +802,10 @@ check_links: checklinks.awk $(TDATA_TO_CHECK) tzdata.zi
$(AWK) -f checklinks.awk tzdata.zi
touch $@
check_tables: checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
check_tables: checktab.awk $(YDATA) backward $(ZONETABLES)
for tab in $(ZONETABLES); do \
$(AWK) -f checktab.awk -v zone_table=$$tab $(PRIMARY_YDATA) \
test "$$tab" = zone.tab && links='$(BACKWARD)' || links=''; \
$(AWK) -f checktab.awk -v zone_table=$$tab $(YDATA) $$links \
|| exit; \
done
touch $@
......@@ -952,6 +959,12 @@ check_public: $(VERSION_DEPS)
public.dir/zic -v -d public.dir/zoneinfo $$i 2>&1 || exit; \
done
public.dir/zic -v -d public.dir/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 -fr public.dir
touch $@
......@@ -964,7 +977,7 @@ $(TIME_T_ALTERNATIVES): $(VERSION_DEPS)
mkdir $@.dir
ln $(VERSION_DEPS) $@.dir
case $@ in \
int32_t) range=-2147483648,2147483648;; \
int*32_t) range=-2147483648,2147483648;; \
u*) range=0,4294967296;; \
*) range=-4294967296,4294967296;; \
esac && \
......
News for the tz database
Release 2021b - 2021-09-24 16:23:00 -0700
Briefly:
Jordan now starts DST on February's last Thursday.
Samoa no longer observes DST.
Merge more location-based Zones whose timestamps agree since 1970.
Move some backward-compatibility links to 'backward'.
Rename Pacific/Enderbury to Pacific/Kanton.
Correct many pre-1993 transitions in Malawi, Portugal, etc.
zic now creates each output file or link atomically.
zic -L no longer omits the POSIX TZ string in its output.
zic fixes for truncation and leap second table expiration.
zic now follows POSIX for TZ strings using all-year DST.
Fix some localtime crashes and bugs in obscure cases.
zdump -v now outputs more-useful boundary cases.
tzfile.5 better matches a draft successor to RFC 8536.
A new file SECURITY.
This release is prompted by recent announcements by Jordan and Samoa.
It incorporates many other changes that had accumulated since 2021a.
However, it omits most proposed changes that merged all Zones
agreeing since 1970, as concerns were raised about doing too many of
these changes at once. It does keeps some of these changes in the
interest of making tzdb more equitable one step at a time; see
"Merge more location-based Zones" below.
Changes to future timestamps
Jordan now starts DST on February's last Thursday.
(Thanks to Steffen Thorsen.)
Samoa no longer observes DST. (Thanks to Geoffrey D. Bennett.)
Changes to zone name
Rename Pacific/Enderbury to Pacific/Kanton. When we added
Enderbury in 1993, we did not know that it is uninhabited and that
Kanton (population two dozen) is the only inhabited location in
that timezone. The old name is now a backward-compatility link.
Changes to past timestamps
Correct many pre-1993 transitions, fixing entries originally
derived from Shanks, Whitman, and Mundell. The fixes include:
- Barbados: standard time was introduced in 1911, not 1932; and
DST was observed in 1942-1944
- Cook Islands: In 1899 they switched from east to west of GMT,
celebrating Christmas for two days. They (and Niue) switched
to standard time in 1952, not 1901.
- Guyana: corrected LMT for Georgetown; the introduction of
standard time in 1911, not 1915; and corrections to 1975 and
1992 transitions
- Kanton: uninhabited before 1937-08-31
- Niue: only observed -11:20 from 1952 through 1964, then went to
-11 instead of -11:30
- Portugal: DST was observed in 1950
- Tonga: corrected LMT; the introduction of standard time in 1945,
not 1901; and corrections to the transition from +12:20 to +13
in 1961, not 1941
Additional fixes to entries in the 'backzone' file include:
- Enderbury: inhabited only 1860/1885 and 1938-03-06/1942-02-09
- The Gambia: 1933 and 1942 transitions
- Malawi: several 1911 through 1925 transitions
- Sierra Leone: several 1913 through 1941 transitions, and DST
was NOT observed in 1957 through 1962
(Thanks to P Chan, Michael Deckers, Alexander Krivenyshev and
Alois Treindl.)
Merge more location-based Zones whose timestamps agree since 1970,
as pre-1970 timestamps are out of scope. This is part of a
process that has been ongoing since 2013. This does not affect
post-1970 timestamps, and timezone historians who build with 'make
PACKRATDATA=backzone' should see no changes to pre-1970 timestamps.
When merging, keep the most-populous location's data, and move
data for other locations to 'backzone' with a backward
link in 'backward'. For example, move America/Creston data to
'backzone' with a link in 'backward' from America/Phoenix because
the two timezones' timestamps agree since 1970; this change
affects some pre-1968 timestamps in America/Creston because
Creston and Phoenix disagreed before 1968. The affected Zones
are Africa/Accra, America/Atikokan, America/Blanc-Sablon,
America/Creston, America/Curacao, America/Nassau,
America/Port_of_Spain, Antarctica/DumontDUrville, and
Antarctica/Syowa.
Changes to maintenance procedure
The new file SECURITY covers how to report security-related bugs.
Several backward-compatibility links have been moved to the
'backward' file. These links, which range from Africa/Addis_Ababa
to Pacific/Saipan, are only for compatibility with now-obsolete
guidelines suggesting an entry for every ISO 3166 code.
The intercontinental convenience links Asia/Istanbul and
Europe/Nicosia have also been moved to 'backward'.
Changes to code
zic now creates each output file or link atomically,
possibly by creating a temporary file and then renaming it.
This avoids races where a TZ setting would temporarily stop
working while zic was installing a replacement file or link.
zic -L no longer omits the POSIX TZ string in its output.
Starting with 2020a, zic -L truncated its output according to the
"Expires" directive or "#expires" comment in the leapseconds file.
The resulting TZif files omitted daylight saving transitions after
the leap second table expired, which led to far less-accurate
predictions of times after the expiry. Although future timestamps
cannot be converted accurately in the presence of leap seconds, it
is more accurate to convert near-future timestamps with a few
seconds error than with an hour error, so zic -L no longer
truncates output in this way.
Instead, when zic -L is given the "Expires" directive, it now
outputs the expiration by appending a no-change entry to the leap
second table. Although this should work well with most TZif
readers, it does not conform to Internet RFC 8536 and some pickier
clients (including tzdb 2017c through 2021a) reject it, so
"Expires" directives are currently disabled by default. To enable
them, set the EXPIRES_LINE Makefile variable. If a TZif file uses
this new feature it is marked with a new TZif version number 4,
a format intended to be documented in a successor to RFC 8536.
zic -L LEAPFILE -r @LO no longer generates an invalid TZif file
that omits leap second information for the range LO..B when LO
falls between two leap seconds A and B. Instead, it generates a
TZif version 4 file that represents the previously-missing
information.
The TZif reader now allows the leap second table to begin with a
correction other than -1 or +1, and to contain adjacent
transitions with equal corrections. This supports TZif version 4.
The TZif reader now lets leap seconds occur less than 28 days
apart. This supports possible future TZif extensions.
Fix bug that caused 'localtime' etc. to crash when TZ was
set to a all-year DST string like "EST5EDT4,0/0,J365/25" that does
not conform to POSIX but does conform to Internet RFC 8536.
Fix another bug that caused 'localtime' etc. to crash when TZ was
set to a POSIX-conforming but unusual TZ string like
"EST5EDT4,0/0,J365/0", where almost all the year is DST.
Fix yet another bug that caused 'localtime' etc. to mishandle slim
TZif files containing leap seconds after the last explicit
transition in the table, or when handling far-future timestamps
in slim TZif files lacking leap seconds.
Fix localtime misbehavior involving positive leap seconds.
This change affects only behavior for "right" system time,
which contains leap seconds, and only if the UT offset is
not a multiple of 60 seconds when a positive leap second occurs.
(No such timezone exists in tzdb, luckily.) Without the fix,
the timestamp was ambiguous during a positive leap second.
With the fix, any seconds occurring after a positive leap second
and within the same localtime minute are counted through 60, not
through 59; their UT offset (tm_gmtoff) is the same as before.
Here is how the fix affects timestamps in a timezone with UT
offset +01:23:45 (5025 seconds) and with a positive leap second at
1972-06-30 23:59:60 UTC (78796800):
time_t without the fix with the fix
78796800 1972-07-01 01:23:45 1972-07-01 01:23:45 (leap second)
78796801 1972-07-01 01:23:45 1972-07-01 01:23:46
...
78796815 1972-07-01 01:23:59 1972-07-01 01:23:60
78796816 1972-07-01 01:24:00 1972-07-01 01:24:00
Fix an unlikely bug that caused 'localtime' etc. to misbehave if
civil time changes a few seconds before time_t wraps around, when
leap seconds are enabled.
Fix bug in zic -r; in some cases, the dummy time type after the
last time transition disagreed with the TZ string, contrary to
Internet RFC 8563 section 3.3.
Fix a bug with 'zic -r @X' when X is a negative leap second that
has a nonnegative correction. Without the fix, the output file
was truncated so that X appeared to be a positive leap second.
Fix a similar, even-less-likely bug when truncating at a positive
leap second that has a nonpositive correction.
zic -r now reports an error if given rolling leap seconds, as this
usage has never generally worked and is evidently unused.
zic now generates a POSIX-conforming TZ string for TZif files
where all-year DST is predicted for the indefinite future.
For example, for all-year Eastern Daylight Time, zic now generates
"XXX3EDT4,0/0,J365/23" where it previously generated
"EST5EDT,0/0,J365/25" or "". (Thanks to Michael Deckers for
noting the possibility of POSIX conformance.)
zic.c no longer requires sys/wait.h (thanks to spazmodius for
noting it wasn't needed).
When reading slim TZif files, zdump no longer mishandles leap
seconds on the rare platforms where time_t counts leap seconds,
fixing a bug introduced in 2014g.
zdump -v now outputs timestamps at boundaries of what localtime
and gmtime can represent, instead of the less-useful timestamps
one day after the minimum and one day before the maximum.
(Thanks to Arthur David Olson for prototype code, and to Manuela
Friedrich for debugging help.)
zdump's -c and -t options are now consistently inclusive for the
lower time bound and exclusive for the upper. Formerly they were
inconsistent. (Confusion noted by Martin Burnicki.)
Changes to build procedure
You can now compile with -DHAVE_MALLOC_ERRNO=0 to port to
non-POSIX hosts where malloc doesn't set errno.
(Problem reported by Jan Engelhardt.)
Changes to documentation
tzfile.5 better matches a draft successor to RFC 8536
<https://datatracker.ietf.org/doc/draft-murchison-rfc8536bis/01/>.
Release 2021a - 2021-01-24 10:54:57 -0800
Changes to future timestamps
......@@ -31,7 +254,7 @@ Release 2020e - 2020-12-22 15:14:34 -0800
Correct many pre-1986 transitions, fixing entries originally
derived from Shanks. The fixes include:
- Australia: several 1917 through 1971 transitions
- Bahamas: several 1941 through 1945 transitions
- The Bahamas: several 1941 through 1945 transitions
- Bermuda: several 1917 through 1956 transitions
- Belize: several 1942 through 1968 transitions
- Ghana: several 1915 through 1956 transitions
......@@ -825,8 +1048,8 @@ Release 2018d - 2018-03-22 07:05:46 -0700
Institute in Montevideo.
(Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.)
Enderbury and Kiritimati skipped New Year's Eve 1994, not
New Year's Day 1995. (Thanks to Kerry Shetline.)
East Kiribati skipped New Year's Eve 1994, not New Year's Day 1995.
(Thanks to Kerry Shetline.)
Fix the 1912-01-01 transition for Portugal and its colonies.
This transition was at 00:00 according to the new UT offset, not
......
......@@ -30,9 +30,6 @@
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
# European-style abbreviations are commonly used along the Mediterranean.
# For sub-Saharan Africa abbreviations were less standardized.
# Previous editions of this database used WAT, CAT, SAT, and EAT
......@@ -153,15 +150,6 @@ Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Abidjan -0:16:08 - LMT 1912
0:00 - GMT
Link Africa/Abidjan Africa/Bamako # Mali
Link Africa/Abidjan Africa/Banjul # Gambia
Link Africa/Abidjan Africa/Conakry # Guinea
Link Africa/Abidjan Africa/Dakar # Senegal
Link Africa/Abidjan Africa/Freetown # Sierra Leone
Link Africa/Abidjan Africa/Lome # Togo
Link Africa/Abidjan Africa/Nouakchott # Mauritania
Link Africa/Abidjan Africa/Ouagadougou # Burkina Faso
Link Africa/Abidjan Atlantic/St_Helena # St Helena
# Djibouti
# See Africa/Nairobi.
......@@ -381,93 +369,8 @@ Zone Africa/Cairo 2:05:09 - LMT 1900 Oct
# Gabon
# See Africa/Lagos.
# Gambia
# See Africa/Abidjan.
# The Gambia
# Ghana
# From P Chan (2020-11-20):
# Interpretation Amendment Ordinance, 1915 (No.24 of 1915) [1915-11-02]
# Ordinances of the Gold Coast, Ashanti, Northern Territories 1915, p 69-71
# https://books.google.com/books?id=ErA-AQAAIAAJ&pg=PA70
# This Ordinance added "'Time' shall mean Greenwich Mean Time" to the
# Interpretation Ordinance, 1876.
#
# Determination of the Time Ordinance, 1919 (No. 18 of 1919) [1919-11-24]
# Ordinances of the Gold Coast, Ashanti, Northern Territories 1919, p 75-76
# https://books.google.com/books?id=MbA-AQAAIAAJ&pg=PA75
# This Ordinance removed the previous definition of time and introduced DST.
#
# Time Determination Ordinance (Cap. 214)
# The Laws of the Gold Coast (including Togoland Under British Mandate)
# Vol. II (1937), p 2328
# https://books.google.com/books?id=Z7M-AQAAIAAJ&pg=PA2328
# Revised edition of the 1919 Ordinance.
#
# Time Determination (Amendment) Ordinance, 1940 (No. 9 of 1940) [1940-04-06]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1940, p 22
# https://books.google.com/books?id=1ao-AQAAIAAJ&pg=PA22
# This Ordinance changed the forward transition from September to May.
#
# Defence (Time Determination Ordinance Amendment) Regulations, 1942
# (Regulations No. 6 of 1942) [1942-01-31, commenced on 1942-02-08]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1942, p 48
# https://books.google.com/books?id=Das-AQAAIAAJ&pg=PA48
# These regulations advanced the [standard] time by thirty minutes.
#
# Defence (Time Determination Ordinance Amendment (No.2)) Regulations,
# 1942 (Regulations No. 28 of 1942) [1942-04-25]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1942, p 87
# https://books.google.com/books?id=Das-AQAAIAAJ&pg=PA87
# These regulations abolished DST and changed the time to GMT+0:30.
#
# Defence (Revocation) (No.4) Regulations, 1945 (Regulations No. 45 of
# 1945) [1945-10-24, commenced on 1946-01-06]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1945, p 256
# https://books.google.com/books?id=9as-AQAAIAAJ&pg=PA256
# These regulations revoked the previous two sets of Regulations.
#
# Time Determination (Amendment) Ordinance, 1945 (No. 18 of 1945) [1946-01-06]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1945, p 69
# https://books.google.com/books?id=9as-AQAAIAAJ&pg=PA69
# This Ordinance abolished DST.
#
# Time Determination (Amendment) Ordinance, 1950 (No. 26 of 1950) [1950-07-22]
# Annual Volume of the Laws of the Gold Coast:
# Containing All Legislation Enacted During Year 1950, p 35
# https://books.google.com/books?id=e60-AQAAIAAJ&pg=PA35
# This Ordinance restored DST but with thirty minutes offset.
#
# Time Determination Ordinance (Cap. 264)
# The Laws of the Gold Coast, Vol. V (1954), p 380
# https://books.google.com/books?id=Mqc-AQAAIAAJ&pg=PA380
# Revised edition of the Time Determination Ordinance.
#
# Time Determination (Amendment) Ordinance, 1956 (No. 21 of 1956) [1956-08-29]
# Annual Volume of the Ordinances of the Gold Coast Enacted During the
# Year 1956, p 83
# https://books.google.com/books?id=VLE-AQAAIAAJ&pg=PA83
# This Ordinance abolished DST.
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
Rule Ghana 1919 only - Nov 24 0:00 0:20 +0020
Rule Ghana 1920 1942 - Jan 1 2:00 0 GMT
Rule Ghana 1920 1939 - Sep 1 2:00 0:20 +0020
Rule Ghana 1940 1941 - May 1 2:00 0:20 +0020
Rule Ghana 1950 1955 - Sep 1 2:00 0:30 +0030
Rule Ghana 1951 1956 - Jan 1 2:00 0 GMT
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Accra -0:00:52 - LMT 1915 Nov 2
0:00 Ghana %s 1942 Feb 8
0:30 - +0030 1946 Jan 6
0:00 Ghana %s
# Guinea
# See Africa/Abidjan.
......@@ -533,15 +436,6 @@ Zone Africa/Nairobi 2:27:16 - LMT 1908 May
2:30 - +0230 1936 Dec 31 24:00
2:45 - +0245 1942 Jul 31 24:00
3:00 - EAT
Link Africa/Nairobi Africa/Addis_Ababa # Ethiopia
Link Africa/Nairobi Africa/Asmara # Eritrea
Link Africa/Nairobi Africa/Dar_es_Salaam # Tanzania
Link Africa/Nairobi Africa/Djibouti
Link Africa/Nairobi Africa/Kampala # Uganda
Link Africa/Nairobi Africa/Mogadishu # Somalia
Link Africa/Nairobi Indian/Antananarivo # Madagascar
Link Africa/Nairobi Indian/Comoro
Link Africa/Nairobi Indian/Mayotte
# Lesotho
# See Africa/Johannesburg.
......@@ -732,7 +626,7 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
# See Africa/Nairobi.
# Morocco
# See the 'europe' file for Spanish Morocco (Africa/Ceuta).
# See Africa/Ceuta for Spanish Morocco.
# From Alex Krivenyshev (2008-05-09):
# Here is an article that Morocco plan to introduce Daylight Saving Time between
......@@ -1228,13 +1122,6 @@ Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Maputo 2:10:20 - LMT 1903 Mar
2:00 - CAT
Link Africa/Maputo Africa/Blantyre # Malawi
Link Africa/Maputo Africa/Bujumbura # Burundi
Link Africa/Maputo Africa/Gaborone # Botswana
Link Africa/Maputo Africa/Harare # Zimbabwe
Link Africa/Maputo Africa/Kigali # Rwanda
Link Africa/Maputo Africa/Lubumbashi # E Dem. Rep. of Congo
Link Africa/Maputo Africa/Lusaka # Zambia
# Namibia
......@@ -1382,23 +1269,12 @@ Zone Africa/Lagos 0:13:35 - LMT 1905 Jul 1
0:13:35 - LMT 1914 Jan 1
0:30 - +0030 1919 Sep 1
1:00 - WAT
Link Africa/Lagos Africa/Bangui # Central African Republic
Link Africa/Lagos Africa/Brazzaville # Rep. of the Congo
Link Africa/Lagos Africa/Douala # Cameroon
Link Africa/Lagos Africa/Kinshasa # Dem. Rep. of the Congo (west)
Link Africa/Lagos Africa/Libreville # Gabon
Link Africa/Lagos Africa/Luanda # Angola
Link Africa/Lagos Africa/Malabo # Equatorial Guinea
Link Africa/Lagos Africa/Niamey # Niger
Link Africa/Lagos Africa/Porto-Novo # Benin
# Réunion
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Indian/Reunion 3:41:52 - LMT 1911 Jun # Saint-Denis
4:00 - +04
#
# Crozet Islands also observes Réunion time; see the 'antarctica' file.
#
# Scattered Islands (Îles Éparses) administered from Réunion are as follows.
# The following information about them is taken from
# Îles Éparses (<http://www.outre-mer.gouv.fr/domtom/ile.htm>, 1997-07-22,
......@@ -1490,8 +1366,6 @@ Rule SA 1943 1944 - Mar Sun>=15 2:00 0 -
Zone Africa/Johannesburg 1:52:00 - LMT 1892 Feb 8
1:30 - SAST 1903 Mar
2:00 SA SAST
Link Africa/Johannesburg Africa/Maseru # Lesotho
Link Africa/Johannesburg Africa/Mbabane # Eswatini
#
# Marion and Prince Edward Is
# scientific station since 1947
......@@ -1527,12 +1401,13 @@ Zone Africa/Khartoum 2:10:08 - LMT 1931
3:00 - EAT 2017 Nov 1
2:00 - CAT
# South Sudan
# From Steffen Thorsen (2021-01-18):
# "South Sudan will change its time zone by setting the clock back 1
# hour on February 1, 2021...."
# from https://eyeradio.org/south-sudan-adopts-new-time-zone-makuei/
# South Sudan
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Juba 2:06:28 - LMT 1931
2:00 Sudan CA%sT 2000 Jan 15 12:00
......@@ -1637,7 +1512,7 @@ Rule Tunisia 2005 only - Sep 30 1:00s 0 -
Rule Tunisia 2006 2008 - Mar lastSun 2:00s 1:00 S
Rule Tunisia 2006 2008 - Oct lastSun 2:00s 0 -
# See Europe/Paris for PMT-related transitions.
# See Europe/Paris commentary for PMT-related transitions.
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Tunis 0:40:44 - LMT 1881 May 12
0:09:21 - PMT 1911 Mar 11 # Paris Mean Time
......
......@@ -148,7 +148,7 @@ Zone Antarctica/Mawson 0 - -00 1954 Feb 13
#
# Alfred Faure, Possession Island, Crozet Islands, -462551+0515152, since 1964;
# sealing & whaling stations operated variously 1802/1911+;
# see Indian/Reunion.
# see Asia/Dubai.
#
# Martin-de-Viviès, Amsterdam Island, -374105+0773155, since 1950
# Port-aux-Français, Kerguelen Islands, -492110+0701303, since 1951;
......@@ -162,17 +162,7 @@ Zone Indian/Kerguelen 0 - -00 1950 # Port-aux-Français
5:00 - +05
#
# year-round base in the main continent
# Dumont d'Urville, Île des Pétrels, -6640+14001, since 1956-11
# <https://en.wikipedia.org/wiki/Dumont_d'Urville_Station> (2005-12-05)
#
# Another base at Port-Martin, 50km east, began operation in 1947.
# It was destroyed by fire on 1952-01-14.
#
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/DumontDUrville 0 - -00 1947
10:00 - +10 1952 Jan 14
0 - -00 1956 Nov
10:00 - +10
# Dumont d'Urville - see Pacific/Port_Moresby.
# France & Italy - year-round base
# Concordia, -750600+1232000, since 2005
......@@ -188,20 +178,7 @@ Zone Antarctica/DumontDUrville 0 - -00 1947
# Zuchelli, Terra Nova Bay, -744140+1640647, since 1986
# Japan - year-round bases
# Syowa (also known as Showa), -690022+0393524, since 1957
#
# From Hideyuki Suzuki (1999-02-06):