Date: Sun, 26 Apr 2026 02:07:53 +0000 From: Philip Paeps <philip@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 30eb33424e74 - stable/14 - contrib/tzdata: import tzdata 2026b Message-ID: <69ed7379.32213.7f2bccbb@gitrepo.freebsd.org>
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The branch stable/14 has been updated by philip: URL: https://cgit.FreeBSD.org/src/commit/?id=30eb33424e74f467346319876e20a83ff71e00cd commit 30eb33424e74f467346319876e20a83ff71e00cd Author: Philip Paeps <philip@FreeBSD.org> AuthorDate: 2026-04-23 15:44:33 +0000 Commit: Philip Paeps <philip@FreeBSD.org> CommitDate: 2026-04-26 02:05:49 +0000 contrib/tzdata: import tzdata 2026b Changes: https://github.com/eggert/tz/blob/2026b/NEWS (cherry picked from commit 9b95cab0a2927dfe07dbe6dc0056a80d5c730414) --- contrib/tzdata/NEWS | 53 +++++++++++++++++++++++++++++++++++------- contrib/tzdata/northamerica | 56 ++++++++++++++++++++++++++++++++++++++++++++- contrib/tzdata/version | 2 +- contrib/tzdata/zone.tab | 2 +- contrib/tzdata/zone1970.tab | 2 +- contrib/tzdata/zonenow.tab | 3 +++ 6 files changed, 106 insertions(+), 12 deletions(-) diff --git a/contrib/tzdata/NEWS b/contrib/tzdata/NEWS index acd22280cb3a..a0042701c687 100644 --- a/contrib/tzdata/NEWS +++ b/contrib/tzdata/NEWS @@ -1,10 +1,47 @@ News for the tz database +Release 2026a - 2026-04-22 23:06:43 -0700 + + Briefly: + British Columbia moved to permanent -07 on 2026-03-09. + Some more overflow bugs have been fixed in zic. + + Changes to future timestamps + + British Columbia’s 2026-03-08 spring forward was its last + foreseeable clock change, as it moved to permanent -07 thereafter. + (Thanks to Arthur David Olson.) Although the change to permanent + -07 legally took place on 2026-03-09, temporarily model the change + to occur on 2026-11-01 at 02:00 instead. This works around a + limitation in CLDR v48.2 (2026-03-17). This temporary hack is + planned to be removed after CLDR is fixed. + + Changes to code + + zic no longer mishandles a last transition to a new time type. + + zic no longer overflows a buffer when generating a TZ string like + "PST-167:59:58PDT-167:59:59,M11.5.6/-167:59:59,M12.5.6/-167:59:59", + which can occur with adversarial input. (Thanks to Naveed Khan.) + + zic no longer generates a longer TZif file than necessary when + an earlier time zone abbreviation is a suffix of a later one. + As a nice side effect, zic no longer overflows a buffer when given + a long series of abbreviations, each a suffix of the next. + (Buffer overflow reported by Arthur Chan.) + + zic no longer overflows an int when processing input like ‘Zone + Ouch 2147483648:00:00 - LMT’. The int overflow can lead to buffer + overflow in adversarial cases. (Thanks to Naveed Khan.) + + zic now checks for signals more often. + + Release 2026a - 2026-03-01 22:59:49 -0800 Briefly: Moldova has used EU transition times since 2022. - The "right" TZif files are no longer installed by default. + The “right” TZif files are no longer installed by default. -DTZ_RUNTIME_LEAPS=0 disables runtime support for leap seconds. TZif files are no longer limited to 50 bytes of abbreviations. zic is no longer limited to 50 leap seconds. @@ -25,23 +62,23 @@ Release 2026a - 2026-03-01 22:59:49 -0800 The Makefile no longer by default installs an alternate set of TZif files for system clocks that count leap seconds. - Install with 'make REDO=posix_right' to get the old default, + Install with ‘make REDO=posix_right’ to get the old default, which is rarely used in major downstream distributions. If your system clock counts leap seconds (contrary to POSIX), - it is better to install with 'make REDO=right_only'. + it is better to install with ‘make REDO=right_only’. This change does not affect the leapseconds file, which is still installed as before. - The Makefile's POSIXRULES option, which was declared obsolete in - release 2019b, has been removed. The Makefile's build procedure + The Makefile’s POSIXRULES option, which was declared obsolete in + release 2019b, has been removed. The Makefile’s build procedure thus no longer optionally installs the obsolete posixrules file. Changes to code Compiling with the new option -DTZ_RUNTIME_LEAPS=0 disables runtime support for leap seconds. Although this conforms to - POSIX, shrinks tzcode's attack surface, and is more efficient, - it fails to support Internet RFC 9636's leap seconds. + POSIX, shrinks tzcode’s attack surface, and is more efficient, + it fails to support Internet RFC 9636’s leap seconds. zic now can generate, and localtime.c can now use, TZif files that hold up to 256 bytes of abbreviations, counting trailing NULs. @@ -51,7 +88,7 @@ Release 2026a - 2026-03-01 22:59:49 -0800 zic -L can now generate TZif files with more than 50 leap seconds. This helps test TZif readers not limited to 50 leap seconds, as - tzcode's localtime.c is; it has little immediate need for + tzcode’s localtime.c is; it has little immediate need for practical timekeeping as there have been only 27 leap seconds and possibly there will be no more, due to planned changes to UTC. zic -v warns if its output exceeds the old 50-second limit. diff --git a/contrib/tzdata/northamerica b/contrib/tzdata/northamerica index 16b79af29b55..3e8641e1c20a 100644 --- a/contrib/tzdata/northamerica +++ b/contrib/tzdata/northamerica @@ -1957,6 +1957,56 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. +# From Arthur David Olson (2026-03-02): +# B. C. Gov News: “Adopting permanent daylight saving time: ‘Spring forward’ +# on March 8 will be the last time change, ending twice-yearly clock changes.” +# https://news.gov.bc.ca/releases/2026AG0013-000209 +# +# From Paul Eggert (2026-03-07): +# The law says that 21 hours after the usual 2026-03-08 02:00 switch from +# PST to PDT, the next day inaugurates the new standard time Pacific Time, +# i.e., just one clock change but two name changes separated by 21 hours. +# PT, the obvious abbreviation for Pacific Time, is one letter too short +# to conform to TZDB’s (and POSIX’s) [-+[:alnum:]]{3,6} requirements. +# I asked the BC government for advice, with no response. For now, do this: +# 1. As a temporary hack, pretend that the BC law takes effect +# not on 2026-03-09 at 00:00, but on 2026-11-01 at 02:00. +# This pretense works around a limitation in CLDR v48.2 (2026-03-17), +# which would otherwise say the interval uses “Pacific Standard Time”. +# (Below, this temporary hack is marked “Temporary hack; see above.”) +# Strictly speaking this hack is incorrect since the interval uses +# standard time, but it does have the right UT offset and it +# works around the CLDR limitation. We should be able to remove +# the temporary hack after CLDR is fixed. +# 2. After the BC law takes effect, model the time as MST sans DST. +# We can change this later if another conforming non-numeric abbreviation +# for Pacific Time becomes more popular. Possibilities include: +# MST - the most compatible with existing software and practice, +# and already used in parts of BC and in Yukon +# PDT - almost as software-friendly, but confusing because it implies +# it is DST and is paired with PST, whereas PT is standard time +# PST - straightforward but even more confusing, +# and will likely break much software that assumes PST is -08 +# -07 - accurate and clear in itself, but makes BC look odd vs neighbors +# CPT, CPST - for Canadian Pacific (Standard) Time, +# by analogy with AEST in Australia +# P-T - conforming approximation to “PT” +# PT+ - like P-T but suggesting one-hour advance over PST + +# From Chris Walton (2026-03-15): +# The Regional District of East Kootenay is planning to move to year-round +# Mountain Standard Time (MST) on November 1, 2026.... +# https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time +# (2026-03-17): +# The final decision East Kootenay made a few days ago may turn out not to +# be final after all. They are going to reopen the debate next month! +# https://www.cbc.ca/news/canada/british-columbia/what-time-is-it-in-the-east-kootenay-debate-9.7132624 +# From Paul Eggert (2026-03-17): +# Mayor Steve Fairbairn of Elkford asked the question be called a second time, +# saying, “Pardon the pun, but this is not a time-sensitive issue.” +# For now, merely mention the potential change in these comments. +# If it happens it would likely affect clocks starting 2027-03-14 at 02:00. + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 27 2:00 0 S @@ -1970,7 +2020,11 @@ Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 - -8:00 Canada P%sT + -8:00 Canada P%sT 2026 Mar 9 + # Temporary hack; see above. + -8:00 1:00 PDT 2026 Nov 1 02:00 + # End of temporary hack. + -7:00 - MST Zone America/Dawson_Creek -8:00:56 - LMT 1884 -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 diff --git a/contrib/tzdata/version b/contrib/tzdata/version index 5d9126009e7f..75d34ee38931 100644 --- a/contrib/tzdata/version +++ b/contrib/tzdata/version @@ -1 +1 @@ -2026a +2026b diff --git a/contrib/tzdata/zone.tab b/contrib/tzdata/zone.tab index 2626b0550341..2ae8a8c439eb 100644 --- a/contrib/tzdata/zone.tab +++ b/contrib/tzdata/zone.tab @@ -124,12 +124,12 @@ CA +5017-10750 America/Swift_Current CST - SK (midwest) CA +5333-11328 America/Edmonton Mountain - AB, BC(E), NT(E), SK(W) CA +690650-1050310 America/Cambridge_Bay Mountain - NU (west) CA +682059-1334300 America/Inuvik Mountain - NT (west) +CA +4916-12307 America/Vancouver MST - BC (most areas) CA +4906-11631 America/Creston MST - BC (Creston) CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) CA +6043-13503 America/Whitehorse MST - Yukon (east) CA +6404-13925 America/Dawson MST - Yukon (west) -CA +4916-12307 America/Vancouver Pacific - BC (most areas) CC -1210+09655 Indian/Cocos CD -0418+01518 Africa/Kinshasa Dem. Rep. of Congo (west) CD -1140+02728 Africa/Lubumbashi Dem. Rep. of Congo (east) diff --git a/contrib/tzdata/zone1970.tab b/contrib/tzdata/zone1970.tab index 92fc36544c75..48b9aa978d53 100644 --- a/contrib/tzdata/zone1970.tab +++ b/contrib/tzdata/zone1970.tab @@ -116,11 +116,11 @@ CA +5017-10750 America/Swift_Current CST - SK (midwest) CA +5333-11328 America/Edmonton Mountain - AB, BC(E), NT(E), SK(W) CA +690650-1050310 America/Cambridge_Bay Mountain - NU (west) CA +682059-1334300 America/Inuvik Mountain - NT (west) +CA +4916-12307 America/Vancouver MST - BC (most areas) CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) CA +6043-13503 America/Whitehorse MST - Yukon (east) CA +6404-13925 America/Dawson MST - Yukon (west) -CA +4916-12307 America/Vancouver Pacific - BC (most areas) CH,DE,LI +4723+00832 Europe/Zurich Büsingen CI,BF,GH,GM,GN,IS,ML,MR,SH,SL,SN,TG +0519-00402 Africa/Abidjan CK -2114-15946 Pacific/Rarotonga diff --git a/contrib/tzdata/zonenow.tab b/contrib/tzdata/zonenow.tab index aa3a64f3d7b9..54e4485d7441 100644 --- a/contrib/tzdata/zonenow.tab +++ b/contrib/tzdata/zonenow.tab @@ -58,6 +58,9 @@ XX -2504-13005 Pacific/Pitcairn Pitcairn # -08/-07 - PST/PDT (North America DST) XX +340308-1181434 America/Los_Angeles Pacific (PST/PDT) - US & Canada; Mexico near US border # +# -08/-07 - PST/PDT (North America DST) until 2026-11-01 02:00; then MST +XX +4916-12307 America/Vancouver MST - BC (most areas) +# # -07 - MST XX +332654-1120424 America/Phoenix Mountain Standard (MST) - Arizona; western Mexico; Yukon #home | help
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