Skip to content

8388214: (tz) Update Timezone Data to 2026c #768

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
jerboaa wants to merge 1 commit into from
Closed

8388214: (tz) Update Timezone Data to 2026c #768

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion src/java.base/share/data/tzdata/VERSION
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,4 +21,4 @@
# or visit www.oracle.com if you need additional information or have any
# questions.
#
tzdata2026b
tzdata2026c
191 changes: 32 additions & 159 deletions src/java.base/share/data/tzdata/africa
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -620,6 +620,24 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
# Morocco
# See Africa/Ceuta for Spanish Morocco.

# From Paul Eggert (2026-06-26):
# In “Morocco’s GMT+1, a century of shifting time and a debate far from over”
# https://en.yabiladi.com/articles/details/191310/morocco-s-gmt1-century-shifting-time
# (2026-03-30), Yabiladi’s Latifa Babas reports the following:
# * A 1913-10-26 royal dahir established GMT as legal time in Morocco.
# * A 1918-05-10 dahir instituted DST on 1918-05-16 at 00:00.
# * A September 1939 dahir restarted DST on 1939-09-12.
# * A February 1940 dahir restarted DST as early as 1940-02-25.
# * Standard time resumed in September 1946.
# * A June 1950 decree restarted DST, which ran until as late as October.
# * Royal decree 455-67 (1967-06-02) restarted DST on June 3 at noon.
# * After 1967 Morocco used DST “during several summers, particularly
# throughout the 1970s and 1980s.”
# Babas consulted official records that disagree with and are surely
# more correct than our pre-2008 timestamp data, which came from the
# unreliable Shanks & Pottenger. Unfortunately, Babas did not provide
# enough detail to correct our data.

# From Alex Krivenyshev (2008-05-09):
# Here is an article that Morocco plan to introduce Daylight Saving Time between
# 1 June, 2008 and 27 September, 2008.
Expand Down Expand Up @@ -873,33 +891,16 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
# The return to legal GMT time will take place this Sunday, March 19 at 3 a.m.
# ... the return to GMT+1 will be made on Sunday April 23, 2023 at 2 a.m.
# https://www.mmsp.gov.ma/fr/actualites/passage-à-l%E2%80%99heure-gmt-à-partir-du-dimanche-19-mars-2023
#
# From Paul Eggert (2023-03-14):
# For now, guess that in the future Morocco will fall back at 03:00
# the last Sunday before Ramadan, and spring forward at 02:00 the
# first Sunday after one day after Ramadan. To implement this,
# transition dates and times for 2019 through 2087 were determined by
# running the following program under GNU Emacs 28.2. (This algorithm
# also produces the correct transition dates for 2016 through 2018,
# though the times differ due to Morocco's time zone change in 2018.)
# (let ((islamic-year 1440))
# (require 'cal-islam)
# (while (< islamic-year 1511)
# (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
# (b (+ 1 (calendar-islamic-to-absolute (list 10 1 islamic-year))))
# (sunday 0))
# (while (/= sunday (mod (setq a (1- a)) 7)))
# (while (/= sunday (mod b 7))
# (setq b (1+ b)))
# (setq a (calendar-gregorian-from-absolute a))
# (setq b (calendar-gregorian-from-absolute b))
# (insert
# (format
# (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 3:00\t-1:00\t-\n"
# "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 2:00\t0\t-\n")
# (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
# (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
# (setq islamic-year (+ 1 islamic-year))))

# From Paul Eggert (2026-06-25):
# https://www.moroccoworldnews.com/2026/06/325034/confirmed-morocco-to-restore-gmt-on-september-20-ending-eight-year-gmt1-saga/
# Today the Moroccan government adopted Decree No. 2.26.530, which abrogates
# the 2018 decree that put it at +01 with daylight saving during Ramadan.
# The plan is to go back to +00 without DST on 2026-09-20 at 02:00.
# From Anass Taghjichte (2026-07-03):
# https://www.sgg.gov.ma/BO/AR/3111/2026/BO_7521_Ar.pdf
# From Afaf EL MAAYATI (2026-07-06):
# https://www.mapexpress.ma/actualite/activite-gouvernementale/conseil-gouvernement-approuve-projet-decret-relatif-au-retour-lheure-legale/

# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
Rule Morocco 1939 only - Sep 12 0:00 1:00 -
Expand Down Expand Up @@ -959,143 +960,14 @@ Rule Morocco 2025 only - Feb 23 3:00 -1:00 -
Rule Morocco 2025 only - Apr 6 2:00 0 -
Rule Morocco 2026 only - Feb 15 3:00 -1:00 -
Rule Morocco 2026 only - Mar 22 2:00 0 -
Rule Morocco 2027 only - Feb 7 3:00 -1:00 -
Rule Morocco 2027 only - Mar 14 2:00 0 -
Rule Morocco 2028 only - Jan 23 3:00 -1:00 -
Rule Morocco 2028 only - Mar 5 2:00 0 -
Rule Morocco 2029 only - Jan 14 3:00 -1:00 -
Rule Morocco 2029 only - Feb 18 2:00 0 -
Rule Morocco 2029 only - Dec 30 3:00 -1:00 -
Rule Morocco 2030 only - Feb 10 2:00 0 -
Rule Morocco 2030 only - Dec 22 3:00 -1:00 -
Rule Morocco 2031 only - Jan 26 2:00 0 -
Rule Morocco 2031 only - Dec 14 3:00 -1:00 -
Rule Morocco 2032 only - Jan 18 2:00 0 -
Rule Morocco 2032 only - Nov 28 3:00 -1:00 -
Rule Morocco 2033 only - Jan 9 2:00 0 -
Rule Morocco 2033 only - Nov 20 3:00 -1:00 -
Rule Morocco 2033 only - Dec 25 2:00 0 -
Rule Morocco 2034 only - Nov 5 3:00 -1:00 -
Rule Morocco 2034 only - Dec 17 2:00 0 -
Rule Morocco 2035 only - Oct 28 3:00 -1:00 -
Rule Morocco 2035 only - Dec 9 2:00 0 -
Rule Morocco 2036 only - Oct 19 3:00 -1:00 -
Rule Morocco 2036 only - Nov 23 2:00 0 -
Rule Morocco 2037 only - Oct 4 3:00 -1:00 -
Rule Morocco 2037 only - Nov 15 2:00 0 -
Rule Morocco 2038 only - Sep 26 3:00 -1:00 -
Rule Morocco 2038 only - Oct 31 2:00 0 -
Rule Morocco 2039 only - Sep 18 3:00 -1:00 -
Rule Morocco 2039 only - Oct 23 2:00 0 -
Rule Morocco 2040 only - Sep 2 3:00 -1:00 -
Rule Morocco 2040 only - Oct 14 2:00 0 -
Rule Morocco 2041 only - Aug 25 3:00 -1:00 -
Rule Morocco 2041 only - Sep 29 2:00 0 -
Rule Morocco 2042 only - Aug 10 3:00 -1:00 -
Rule Morocco 2042 only - Sep 21 2:00 0 -
Rule Morocco 2043 only - Aug 2 3:00 -1:00 -
Rule Morocco 2043 only - Sep 13 2:00 0 -
Rule Morocco 2044 only - Jul 24 3:00 -1:00 -
Rule Morocco 2044 only - Aug 28 2:00 0 -
Rule Morocco 2045 only - Jul 9 3:00 -1:00 -
Rule Morocco 2045 only - Aug 20 2:00 0 -
Rule Morocco 2046 only - Jul 1 3:00 -1:00 -
Rule Morocco 2046 only - Aug 5 2:00 0 -
Rule Morocco 2047 only - Jun 23 3:00 -1:00 -
Rule Morocco 2047 only - Jul 28 2:00 0 -
Rule Morocco 2048 only - Jun 7 3:00 -1:00 -
Rule Morocco 2048 only - Jul 19 2:00 0 -
Rule Morocco 2049 only - May 30 3:00 -1:00 -
Rule Morocco 2049 only - Jul 4 2:00 0 -
Rule Morocco 2050 only - May 15 3:00 -1:00 -
Rule Morocco 2050 only - Jun 26 2:00 0 -
Rule Morocco 2051 only - May 7 3:00 -1:00 -
Rule Morocco 2051 only - Jun 18 2:00 0 -
Rule Morocco 2052 only - Apr 28 3:00 -1:00 -
Rule Morocco 2052 only - Jun 2 2:00 0 -
Rule Morocco 2053 only - Apr 13 3:00 -1:00 -
Rule Morocco 2053 only - May 25 2:00 0 -
Rule Morocco 2054 only - Apr 5 3:00 -1:00 -
Rule Morocco 2054 only - May 10 2:00 0 -
Rule Morocco 2055 only - Mar 28 3:00 -1:00 -
Rule Morocco 2055 only - May 2 2:00 0 -
Rule Morocco 2056 only - Mar 12 3:00 -1:00 -
Rule Morocco 2056 only - Apr 23 2:00 0 -
Rule Morocco 2057 only - Mar 4 3:00 -1:00 -
Rule Morocco 2057 only - Apr 8 2:00 0 -
Rule Morocco 2058 only - Feb 17 3:00 -1:00 -
Rule Morocco 2058 only - Mar 31 2:00 0 -
Rule Morocco 2059 only - Feb 9 3:00 -1:00 -
Rule Morocco 2059 only - Mar 23 2:00 0 -
Rule Morocco 2060 only - Feb 1 3:00 -1:00 -
Rule Morocco 2060 only - Mar 7 2:00 0 -
Rule Morocco 2061 only - Jan 16 3:00 -1:00 -
Rule Morocco 2061 only - Feb 27 2:00 0 -
Rule Morocco 2062 only - Jan 8 3:00 -1:00 -
Rule Morocco 2062 only - Feb 12 2:00 0 -
Rule Morocco 2062 only - Dec 31 3:00 -1:00 -
Rule Morocco 2063 only - Feb 4 2:00 0 -
Rule Morocco 2063 only - Dec 16 3:00 -1:00 -
Rule Morocco 2064 only - Jan 27 2:00 0 -
Rule Morocco 2064 only - Dec 7 3:00 -1:00 -
Rule Morocco 2065 only - Jan 11 2:00 0 -
Rule Morocco 2065 only - Nov 22 3:00 -1:00 -
Rule Morocco 2066 only - Jan 3 2:00 0 -
Rule Morocco 2066 only - Nov 14 3:00 -1:00 -
Rule Morocco 2066 only - Dec 26 2:00 0 -
Rule Morocco 2067 only - Nov 6 3:00 -1:00 -
Rule Morocco 2067 only - Dec 11 2:00 0 -
Rule Morocco 2068 only - Oct 21 3:00 -1:00 -
Rule Morocco 2068 only - Dec 2 2:00 0 -
Rule Morocco 2069 only - Oct 13 3:00 -1:00 -
Rule Morocco 2069 only - Nov 17 2:00 0 -
Rule Morocco 2070 only - Oct 5 3:00 -1:00 -
Rule Morocco 2070 only - Nov 9 2:00 0 -
Rule Morocco 2071 only - Sep 20 3:00 -1:00 -
Rule Morocco 2071 only - Nov 1 2:00 0 -
Rule Morocco 2072 only - Sep 11 3:00 -1:00 -
Rule Morocco 2072 only - Oct 16 2:00 0 -
Rule Morocco 2073 only - Aug 27 3:00 -1:00 -
Rule Morocco 2073 only - Oct 8 2:00 0 -
Rule Morocco 2074 only - Aug 19 3:00 -1:00 -
Rule Morocco 2074 only - Sep 30 2:00 0 -
Rule Morocco 2075 only - Aug 11 3:00 -1:00 -
Rule Morocco 2075 only - Sep 15 2:00 0 -
Rule Morocco 2076 only - Jul 26 3:00 -1:00 -
Rule Morocco 2076 only - Sep 6 2:00 0 -
Rule Morocco 2077 only - Jul 18 3:00 -1:00 -
Rule Morocco 2077 only - Aug 22 2:00 0 -
Rule Morocco 2078 only - Jul 10 3:00 -1:00 -
Rule Morocco 2078 only - Aug 14 2:00 0 -
Rule Morocco 2079 only - Jun 25 3:00 -1:00 -
Rule Morocco 2079 only - Aug 6 2:00 0 -
Rule Morocco 2080 only - Jun 16 3:00 -1:00 -
Rule Morocco 2080 only - Jul 21 2:00 0 -
Rule Morocco 2081 only - Jun 1 3:00 -1:00 -
Rule Morocco 2081 only - Jul 13 2:00 0 -
Rule Morocco 2082 only - May 24 3:00 -1:00 -
Rule Morocco 2082 only - Jun 28 2:00 0 -
Rule Morocco 2083 only - May 16 3:00 -1:00 -
Rule Morocco 2083 only - Jun 20 2:00 0 -
Rule Morocco 2084 only - Apr 30 3:00 -1:00 -
Rule Morocco 2084 only - Jun 11 2:00 0 -
Rule Morocco 2085 only - Apr 22 3:00 -1:00 -
Rule Morocco 2085 only - May 27 2:00 0 -
Rule Morocco 2086 only - Apr 14 3:00 -1:00 -
Rule Morocco 2086 only - May 19 2:00 0 -
Rule Morocco 2087 only - Mar 30 3:00 -1:00 -
Rule Morocco 2087 only - May 11 2:00 0 -
# For dates after the somewhat-arbitrary cutoff of 2087, assume that
# Morocco will no longer observe DST. At some point this table will
# need to be extended, though quite possibly Morocco will change the
# rules first.

# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26
0:00 Morocco %z 1984 Mar 16
1:00 - %z 1986
0:00 Morocco %z 2018 Oct 28 3:00
1:00 Morocco %z
1:00 Morocco %z 2026 Sep 20 2:00
0:00 - %z

# Western Sahara
#
Expand All @@ -1111,7 +983,8 @@ Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26
Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún
-1:00 - %z 1976 Apr 14
0:00 Morocco %z 2018 Oct 28 3:00
1:00 Morocco %z
1:00 Morocco %z 2026 Sep 20 2:00
0:00 - %z

# Botswana
# Burundi
Expand Down
2 changes: 1 addition & 1 deletion src/java.base/share/data/tzdata/australasia
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1744,7 +1744,7 @@ Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
# to Japanese rule was right before 1970, ... per the current tz database
# rule, the information doesn't warrant creation of a new timezone for Bonin
# Islands itself and is thus as an anecdotal note for interest purpose only.
# ... [The abovementioned link] described some special timekeeping phenomenon
# ... [The link mentioned above] described some special timekeeping phenomenon
# regarding Marcus island, another remote island currently owned by Japanese
# in the same administrative unit as Bonin Islands. Many reports claim that
# the American coastal guard on the American quarter of the island use its own
Expand Down
21 changes: 14 additions & 7 deletions src/java.base/share/data/tzdata/europe
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -253,7 +253,7 @@
# https://www.polyomino.org.uk/british-time/bbc-19410418.png
# https://www.polyomino.org.uk/british-time/ho-19410421.png

# From Sir Alexander Maxwell in the above-mentioned letter (1941-04-21):
# From Sir Alexander Maxwell (1941-04-21) in the letter mentioned above:
# [N]o official designation has as far as I know been adopted for the time
# which is to be introduced in May....
# I cannot think of anything better than "Double British Summer Time"
Expand Down Expand Up @@ -2038,7 +2038,7 @@ Zone Europe/Malta 0:58:04 - LMT 1893 Nov 2 # Valletta
# From Roman Tudos (2015-07-02):
# http://lex.justice.md/index.php?action=view&view=doc&lang=1&id=355077
# From Paul Eggert (2015-07-01):
# The abovementioned official link to IGO1445-868/2014 states that
# The above-mentioned official link to IGO1445-868/2014 states that
# 2014-10-26's fallback transition occurred at 03:00 local time. Also,
# https://www.trm.md/en/social/la-30-martie-vom-trece-la-ora-de-vara
# says the 2014-03-30 spring-forward transition was at 02:00 local time.
Expand Down Expand Up @@ -2403,10 +2403,17 @@ Zone Europe/Lisbon -0:36:45 - LMT 1884
# 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.
# mainland and its adjacent islands.
#
# From Tim Parenti (2026-05-26):
# Observance of DST on the Azores and Madeira was explicitly covered by
# mainland legislation in:
# - Portaria 11767 of 1947-03-28 for 1947,
# - Portaria 12286 of 1948-02-19 for 1948, and
# - Decreto-Lei 37048 of 1948-09-07 through its revocation in 1966.
# (See mainland commentary, above.) However, most legislation prior to 1947
# didn't explicitly call out these "adjacent islands", so we assume that DST
# rules on the islands prior to 1947 were also like that of the mainland.
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.
Expand Down Expand Up @@ -2639,7 +2646,7 @@ Zone Europe/Bucharest 1:44:24 - LMT 1891 Oct
# http://astro.uni-altai.ru/~orion/blog/2011/11/novyie-granitsyi-chasovyih-poyasov-v-sssr/
#
# From Paul Eggert (2018-07-16):
# Perhaps someone could translate the above-mentioned link and use it
# Perhaps someone could translate the link mentioned above, and use it
# to correct our data for the ex-Soviet Union. It cites the following:
# «Поясное время и новые границы часовых поясов» / сост. П.Н. Долгов,
# отв. ред. Г.Д. Бурдун - М: Комитет стандартов, мер и измерительных
Expand Down
8 changes: 4 additions & 4 deletions src/java.base/share/data/tzdata/leapseconds
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -93,7 +93,7 @@ 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 2026 Dec 28 00:00:00
#Expires 2027 Jun 28 00:00:00

# Here are POSIX timestamps for the data in this file.
# "#updated" gives the last time the leap seconds data changed
Expand All @@ -102,8 +102,8 @@ Leap 2016 Dec 31 23:59:60 + S
# "#expires" gives the first time this file might be wrong;
# if this file was derived from the IERS leap-seconds.list,
# this is typically a bit less than one year after "updated".
#updated 1767698058 (2026-01-06 11:14:18 UTC)
#expires 1798416000 (2026-12-28 00:00:00 UTC)
#updated 1783323897 (2026-07-06 07:44:57 UTC)
#expires 1814140800 (2027-06-28 00:00:00 UTC)

# Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)
# File expires on 28 December 2026
# File expires on 28 June 2027
Loading