Summary of changes in tzdata2018d (2018-03-22 07:05:46 -0700):
In 2018, Palestine starts DST on March 24 (today!), not March 31
Casey Station in Antarctica changed from +11 to +08 on 2018-03-11
at 04:00.
Various adjustments to some historical conversions (several for
Uruguay (1920 .. 1990), one fpr Enderbury and Kiritimati (1994/5),
one for Portugal and colonies (1912) and Jamaica and Turks & Caicos
(pre 1913)).
Summary of changes in tzdata2018d (2018-03-22 07:05:46 -0700):
In 2018, Palestine starts DST on March 24 (today!), not March 31
Casey Station in Antarctica changed from +11 to +08 on 2018-03-11
at 04:00.
Various adjustments to some historical conversions (several for
Uruguay (1920 .. 1990), one fpr Enderbury and Kiritimati (1994/5),
one for Portugal and colonies (1912) and Jamaica and Turks & Caicos
(pre 1913)).
Summary of changes in tzdata2018c (2018-01-22 23:00:44 -0800):
Summary of changes in tzdata2018b (2018-01-17 23:24:48 -0800):
Summary of changes in tzdata2018a (2018-01-12 22:29:21 -0800):
2018a and 2018b were (kind of) released, but never announced.
Some "issues" were found with them that caused the relatively
quick updates...
The updates are from the previous version (2017c) to the
current one (2018c) - that 2018a & 2018b intervened is best
forgotten... (changes in 2018a that were corrected (2018b) or
reverted (2018c) are not mentioned).
Briefly:
Sao Tome and Principe (An island nation off west coast of Equatorial Africa)
switched from +00 to +01.
Brazil's DST will now start on November's first Sunday.
Use Debian-style installation locations, instead of 4.3BSD-style.
(this does not affect NetBSD, we do not use the tzdata Makefile)
Changes to past and future time stamps
Sao Tome and Principe switched from +00 to +01 on 2018-01-01 at
01:00. (Thanks to Steffen Thorsen and Michael Deckers.)
Changes to future time stamps
Starting in 2018 southern Brazil will begin DST on November's
first Sunday instead of October's third Sunday. (Thanks to
Steffen Thorsen.)
Changes to past time stamps
Japanese DST transitions (1948-1951) were Sundays at 00:00, not
Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.)
A discrepancy of 4 s in timestamps before 1931 in South Sudan has
been corrected. The 'backzone' and 'zone.tab' files did not agree
with the 'africa' and 'zone1970.tab' files. (Problem reported by
Michael Deckers.)
The abbreviation invented for Bolivia Summer Time (1931-2) is now
BST instead of BOST, to be more consistent with the convention
used for Latvian Summer Time (1918-9) and for British Summer Time.
Northern Cyprus switches from +03 to +02/+03 on 2017-10-29.
Fiji ends DST 2018-01-14, not 2018-01-21.
Namibia switches from +01/+02 to +02 on 2018-04-01.
Sudan switches from +03 to +02 on 2017-11-01.
Tonga likely switches from +13/+14 to +13 on 2017-11-05.
Turks & Caicos switches from -04 to -05/-04 on 2018-11-04.
Some corrections to (mostly ancient) historical data.
Summary of changes in tzdata2017b (2017-03-17 07:30:38 -0700):
Haiti resumed observance of DST in 2017 (on Mar 12)
Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01.
Use "MMT" to abbreviate Liberia's time zone before 1972,
as "-004430" (tzdata2016a) is one byte over the POSIX limit.
Summary of changes in tzdata2017a (2017-02-28 00:05:36 -0800):
Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia
discontinues DST.
Changes to future time stamps
Mongolia no longer observes DST.
Chile's Region of Magallanes moves from -04/-03 to -03 year-round.
Changes to past time stamps
Fix many entries for historical time stamps for Europe/Madrid
before 1979, to agree with tables compiled by Pere Planesas of the
National Astronomical Observatory of Spain. As a side effect,
this changes some time stamps for Africa/Ceuta before 1929, which
are probably guesswork anyway.
Ecuador observed DST from 1992-11-28 to 1993-02-05.
Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21.
Changes to past and future time zone abbreviations
Switch to numeric time zone abbreviations for South America, as
part of the ongoing project of removing invented abbreviations.
For Alaska time from 1900 through 1967, instead of "CAT" use the
abbreviation "AST", the abbreviation commonly used at the time
(Atlantic Standard Time had not been standardized yet). Use "AWT"
and "APT" instead of the invented abbreviations "CAWT" and "CAPT".
Use "CST" and "CDT" instead of invented abbreviations for Macau
before 1999 and Taiwan before 1938, and use "JST" instead of the
invented abbreviation "JCST" for Japan and Korea before 1938.
Change to database entry category
Move the Pacific/Johnston link from 'australasia' to 'backward',
since Johnston is now uninhabited.
Summary of changes in tzdata2016j (2016-11-22 23:17:13 -0800):
Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00.
This creates a new zone Europe/Saratov.
New zone Asia/Atyrau for Atyrau Region, Kazakhstan, is like
Asia/Aqtau except it switched from +04/+05 to +05/+06 in spring
1999, not fall 1994.
Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote
summer time before 1948. The old use of "EET" was a typo.
(one which used a different key for the signature of the data file...)
Allow either key to work. Also update the name of the sets list
file to match modern reality (only affects instructions issued to user.)
I skipped committing these changes until it had been used a few times
to verify that it actually works properly... it seems to.
Summary of changes in tzdata2016i (2016-11-01 23:19:52 -0700):
Cyprus split into two time zones on 2016-10-30 (new zone is
Asia/Famagusta and is UTC+3 year round). Tonga reintroduces
summer time on 2016-11-06 (assumed for now to be aligned with Fiji).
This year's summer time switch (from +08 to +11) for Antarctica/Casey
occurred 2016-10-22.
Also (minor) adjustments to some historic data for Italy (most
recent applies to time of day of switch out of summer time in period
1967-1970 & 1972-1974, other changes relate to 1910's and 1940's.)
Summary of changes in tzdata2016h (2016-10-19 23:17:57 -0700):
Asia/Gaza and Asia/Hebron end of summer time for 2016 is
2016-10-29 at 01:00 rather than 2016-10-21 at 00:00 (which
is within hours after this update). Guess that future
end dates will be the last Sat of October.
Corrected some historic time (and one date) transition
times for Turkey (all 1990 or before.)
Switch Sri-Lanka to use numeric abbreviation for time zone
as the tzdata invented one is not correct, and the correct
one seems not to be widely used.
Summary of changes in tzdata2016g (2016-09-13 08:56:38 -0700):
Timezone switch in Turkey (summer time becomes standard time)
Transition time corrections for historic timestamps in
America/Los_Angeles
zones using USSR rules in early 20th century
Some (more) time zone abbreviations converted to numeric form
Asia/Rangoon becomes Asia/Yangon (with backward compat link)
Summary of changes in tzdata2016g (2016-09-13 08:56:38 -0700):
Timezone switch in Turkey (summer time becomes standard time)
Transition time corrections for historic timestamps in
America/Los_Angeles
zones using USSR rules in early 20th century
Some (more) time zone abbreviations converted to numeric form
Asia/Rangoon becomes Asia/Yangon (with backward compat link)
Summary of changes in tzdata2016f (2016-07-05 16:26:51 +0200):
* The Egyptian government changed its mind on short notice, and
Africa/Cairo will not introduce DST starting 2016-07-07 after all.
* Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00.
* Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone
abbreviations instead of invented ones.
* Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00.
Summary of changes in tzdata2016e (2016-06-14 08:46:16 -0700):
* Africa/Cairo observes DST in 2016 from July 7 to the end of October.
(change obsoleted by 2016f)
* Locations while uninhabited now use '-00', not 'zzz', as a
placeholder time zone abbreviation.
* Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was
at 03:00, not 23:00 the previous day.
* zic now outputs a dummy transition at time 2**31 - 1 in zones
whose POSIX-style TZ strings contain a '<'.
* Changes affecting documentation and commentary.
Summary of changes in tzdata2016d (2016-04-17 22:50:29 -0700):
* America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30.
* Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00.
* New zone Asia/Tomsk, split off from Asia/Novosibirsk.
* New zone Europe/Kirov, split off from Europe/Volgograd.
* Russia and nearby locations had daylight-saving transitions on
1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on
1992-03-28 at 23:00 and 1992-09-26 at 23:00.
* Many corrections to historical time in Kazakhstan from 1991
through 2005.
* Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references).
Summary of changes in tzdata2016c (2016-03-23 00:51:27 -0700):
* Azerbaijan no longer observes DST.
* Chile reverts from permanent to seasonal DST.
* Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to
+02/+03 on 1989-03-26, not 1991-03-31.
* Several updates and URLs for historical and proposed Russian changes.
Summary of changes in tzdata2016b (2016-03-12 17:30:14 -0800):
* New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and
Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on
2016-03-27 at 02:00 local time.
* As a trial of a new system that needs less information to be made up,
the new zones use numeric time zone abbreviations like "+04"
instead of invented abbreviations like "ASTT".
* Haiti will not observe DST in 2016.
* Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00.
* Europe/Chisinau observed DST during 1990, and switched from +04 to
+03 at 1990-05-06 02:00, instead of switching from +03 to +02.
* 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not
KUYT/KUYST.
* tzselect's diagnostics and checking, and checktab.awk's checking,
have been improved.
* tzcode now builds under MinGW.
* tzselect now tests Julian-date TZ settings more accurately.
* Comments in zone tables have been improved.
* tzselect again limits its menu comments so that menus fit on a
24x80 alphanumeric display.
* A new web page tz-how-to.html.
* In the Theory file, the description of possible time zone abbreviations in
tzdata has been cleaned up, as the old description was unclear and
inconsistent.
Summary of changes in tzdata2016a (2016-01-26 23:28:02 -0800):
* America/Cayman will not observe daylight saving this year after all.
* Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00.
* Asia/Tehran now has DST predictions for the year 2038 and later,
to be March 21 00:00 to September 21 00:00.
* America/Metlakatla switched from PST all year to AKST/AKDT on
2015-11-01 at 02:00.
* America/Santa_Isabel has been removed, and replaced with a
backward compatibility link to America/Tijuana.
* Asia/Karachi's two transition times in 2002 were off by a minute.
* Changes affecting documentation and commentary.
Summary of changes in tzdata2015g (2015-10-01 00:39:51 -0700):
* Turkey's 2015 fall-back transition is scheduled for Nov.
* Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time.
* Fiji's 2016 fall-back transition is scheduled for January 17, not 24.
* Fort Nelson, British Columbia will not fall back on 2015-11-01.
* Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00.
* Changes affecting documentation.
Summary of changes in tzdata2015f (2015-08-10 18:06:56 -0700):
* North Korea switches to +0830 on 2015-08-15.
* Uruguay no longer observes DST.
* Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC.
* The two characters '%z' in a zone format now stand for the UTC
offset, e.g., '-07' for seven hours behind UTC and '+0530' for
five hours and thirty minutes ahead.
* Comments for America/Halifax and America/Glace_Bay have been improved.
* Data entries have been simplified for Atlantic/Canary, Europe/Simferopol,
Europe/Sofia, and Europe/Tallinn.
* Changes affecting documentation.
Summary of changes in tzdata2015e (2015-06-13 10:56:02 -0700):
* Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00,
not 06-13 and 07-18 as we had guessed.
* Assume Cayman Islands will observe DST starting next year, using US rules.
* The file 'iso3166.tab' now uses UTF-8, so that its entries can better
spell the names of Åland Islands, Côte d'Ivoire, and Réunion.
Summary of changes in tzdata2015d (2015-04-24 08:09:46 -0700):
* Egypt will not observe DST in 2015 and will consider canceling it
permanently. For now, assume no DST indefinitely.
* America/Whitehorse switched from UTC-9 to UTC-8 on 1967-05-28, not
1966-07-01.
* The abbreviations for Hawaii-Aleutian standard and daylight times
have been changed from HAST/HADT to HST/HDT, as per US Government
Printing Office style.
Summary of changes in tzdata2015c (2015-04-11 08:55:55 -0700):
* Egypt's spring-forward transition is at 24:00 on April's last Thursday,
not 00:00 on April's last Friday. This affects 2015, 2026, 2037,
2043, etc.
* Changes to pre-1991 Chile-related time stamps in America/Santiago,
Antarctica/Palmer, and Pacific/Easter.
* The America/Montreal zone has been turned into a link, as it differed
from an existing zone only for pre-1970 time stamps.
* Edit version numbers.
* Make the script deal better with being re-run multiple times. It
now keeps a status file for each non-trivial step, and doesn't repeat
the step if the sttaus file exists.
* Instead of spawning a subshell to resolve merge conflicts, print a message
and exit, with a suggestion to rte-run the script after conflicts
are resolved.
* Check whether there are any conflicts before trying to do anything
about conflicts.
Summary of changes in tzdata2015b (2015-03-19 23:28:11 -0700):
* Mongolia will start observing DST again in 2015, from the last
Saturday in March at 02:00 to the last Saturday in September at 00:00.
* Palestine will start DST on March 28, not March 27, in 2015.
* The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a
regression.
* Some more zones have been turned into links, when they differed
from existing zones only for older time stamps.
* Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD".
* Changes affecting commentary.
Summary of changes in tzdata2015a (2015-01-29 22:35:20 -0800):
* The Mexican state of Quintana Roo, represented by America/Cancun,
will shift from Central Time with DST to Eastern Time without DST
on 2015-02-01 at 02:00.
* Chile will not change clocks in April or thereafter; its new standard time
will be its old daylight saving time. This affects America/Santiago,
Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.)
* New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
* Iceland observed DST in 1919 and 1921, and its 1939 fallback
transition was Oct.
* Some more zones have been turned into links, when they differed
from existing zones only for older time stamps.
* Changes affecting commentary.
Summary of changes in tzdata2014j (2014-11-10 17:37:11 -0800):
* Turks & Caicos' switch from US eastern time to UTC-4 year-round
did not occur on 2014-11-02 at 02:00.
* Many pre-1989 time stamps have been corrected for Asia/Seoul and
Asia/Pyongyang, based on sources for the Korean-language Wikipedia
entry for time in Korea.
* Some more zones have been turned into links, when they differed
from existing zones only for older (pre-1970) time stamps.
* Changes affecting commentary.
Summary of changes in tzdata2014i (2014-10-21 22:04:57 -0700):
* Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
* A new Zone Pacific/Bougainville, for the part of Papua New Guinea
that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00.
* Since Belarus is not changing its clocks even though Moscow is,
the time zone abbreviation in Europe/Minsk is changing from FET
to its more-traditional value MSK on 2014-10-26 at 01:00.
* The new abbreviation IDT stands for the pre-1976 use of UT+8 in
Indochina, to distinguish it better from ICT (UT+7).
* Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976.
Asia/Ho_Chi_Minh has been added to zone1970.tab, to give tzselect
users in Vietnam two choices, since north and south Vietnam
disagreed after our 1970 cutoff.
* Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
they differed from existing zones only for older (pre-1970) time stamps.
* Changes affecting commentary.
Summary of changes in tzdata2014i (2014-10-21 22:04:57 -0700):
* Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
Guess that future years will use a similar pattern.
* A new Zone Pacific/Bougainville, for the part of Papua New Guinea
that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00.
* Since Belarus is not changing its clocks even though Moscow is,
the time zone abbreviation in Europe/Minsk is changing from FET
to its more-traditional value MSK on 2014-10-26 at 01:00.
* The new abbreviation IDT stands for the pre-1976 use of UT+8 in
Indochina, to distinguish it better from ICT (UT+7).
* Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976.
Asia/Ho_Chi_Minh has been added to zone1970.tab, since
north and south Vietnam disagreed after our 1970 cutoff.
* Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
they differed from existing zones only for pre-1970 time stamps.
* Changes affecting commentary.
Summary of changes in tzdata2014h (2014-09-25 18:59:03 -0700):
* America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
* Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
not 1920-01-06.
* Some more zones have been turned into links, when they differed
from existing zones only for older time stamps. As usual,
these changes affect UTC offsets in pre-1970 time stamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Africa/Blantyre, Africa/Bujumbura,
Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
* Changes affecting documentation and commentary.
Summary of changes in tzdata2014g (2014-08-28 12:31:23 -0700):
* Turks & Caicos is switching from US eastern time to UTC-4 year-round,
modeled as a switch from EST/EDT to AST on 2014-11-02 at 02:00.
* Time in Russia or the USSR before 1926 or so has been corrected by
a few seconds for several zones, and a few minutes for
Asia/Yekaterinburg.
* The Portuguese decree of 1911-05-26 took effect on 1912-01-01, not
on the date of the decree. This affects 1911 time stamps in
Africa/Bissau, Africa/Luanda, Atlantic/Azores, and Atlantic/Madeira.
* Lisbon's pre-1912 GMT offset was -0:36:45 (rounded from -0:36:44.68),
not -0:36:32.
* Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
* A new file 'backzone' contains data which may appeal to
connoisseurs of old time stamps, although it is out of scope for
the tz database, is often poorly sourced, and contains some data
that is known to be incorrect.
* Some more zones have been turned into links, when they differed
from existing zones only for older time stamps. As usual,
these changes affect UTC offsets in pre-1970 time stamps only.
Their old contents have been moved to the 'backzone' file.
* Changes affecting documentation and commentary.
* Change src/share/zoneinfo to src/external/public-domain/tz.
* The NEWS file is not distributed in the tzdata tar.gz file,
but it logically belongs with it. We were already downloading the
NEWS file from a different location, but now we also add it to the
import directory.
src/external/public-domain/tz/tzdata2netbsd.
This is a verbatim copy, as part of moving the zoneinfo sources in the
NetBSD tree. It will need to be edited before it works.
src/external/public-domain/tz/share/zoneinfo/Makefile.
This is a verbatim copy, as part of moving the zoneinfo sources in the
NetBSD tree. It will need to be edited before it works.
and NEWS file from https://github.com/eggert/tz/raw/2014f/NEWS.
NetBSD's tzdata code is being moved from src/share/zoneinfo to
src/external/public-domain/tz/dist, to simplify future maintenance.
This is the same version of tzata that was previously imported to
src/share/zoneinfo. The NEWS file has been added to the import,
although it is not distributed in the tzdata2014f.tar.gz file.
kre