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Morocco springs forward on 05-31, not 05-24.
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(Thanks to Semlali Naoufal.)
* NEWS: Mention this.
* africa (Morocco): Delay the spring-forward date by a ween
in 2020, 2028, 2035, etc.
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@eggert
eggert committed Apr 15, 2020
1 parent e960c41 commit f9aacaf
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10 changes: 8 additions & 2 deletions NEWS
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Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,20 @@ News for the tz database
Unreleased, experimental changes

Briefly:
Canada's Yukon advances to -07 year-round from 2020-03-08.
Morocco springs forward on 2020-05-31, not 2020-05-24.
Canada's Yukon advanced to -07 year-round on 2020-03-08.
America/Nuuk renamed from America/Godthab.
zic now supports expiration dates for leap second lists.

Changes to future timestamps

Morocco's second spring-forward transition in 2020 will be May 31,
not May 24 as predicted earlier. (Thanks to Semlali Naoufal.)
Adjust future-year predictions to use the first Sunday after the
day after Ramadan, not the first Sunday after Ramadan.

Canada's Yukon, represented by America/Whitehorse and
America/Dawson, advances to -07 year-round, beginning with its
America/Dawson, advanced to -07 year-round, beginning with its
spring-forward transition on 2020-03-08, and will not fall back on
2020-11-01. Although a government press release calls this
"permanent Pacific Daylight Saving Time", we prefer MST for
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50 changes: 28 additions & 22 deletions africa
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Original file line number Diff line number Diff line change
Expand Up @@ -867,19 +867,25 @@ Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis
# Morocco will be on GMT starting from Sunday, May 5th 2019 at 3am.
# The switch to GMT+1 will occur on Sunday, June 9th 2019 at 2am....
# http://fr.le360.ma/societe/voici-la-date-du-retour-a-lheure-legale-au-maroc-188222
#
# From Paul Eggert (2019-05-20):
# This agrees with our 2018-11-01 guess that the Moroccan government
# would continue the practice of falling back at 03:00 the last Sunday
# before Ramadan, and of springing forward at 02:00 the first Sunday after
# Ramadan, as this has been the practice since 2012. To implement this,
# transition dates for 2019 through 2087 were determined by running the
# following program under GNU Emacs 26.2.
# (let ((islamic-year 1440))

# From Semlali Naoufal (2020-04-14):
# Following the announcement by the Moroccan government, the switch to
# GMT time will take place on Sunday, April 19, 2020 from 3 a.m. and
# the return to GMT+1 time will take place on Sunday, May 31, 2020 at 2 a.m....
# https://maroc-diplomatique.net/maroc-le-retour-a-lheure-gmt-est-prevu-dimanche-prochain/
# http://aujourdhui.ma/actualite/gmt1-retour-a-lheure-normale-dimanche-prochain-1
#
# From Paul Eggert (2020-04-14):
# 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 the day after Ramadan. To implement this,
# transition dates for 2021 through 2087 were determined by running
# the following program under GNU Emacs 26.3.
# (let ((islamic-year 1442))
# (require 'cal-islam)
# (while (< islamic-year 1511)
# (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
# (b (calendar-islamic-to-absolute (list 10 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))
Expand Down Expand Up @@ -939,7 +945,7 @@ Rule Morocco 2018 only - Jun 17 2:00 1:00 -
Rule Morocco 2019 only - May 5 3:00 -1:00 -
Rule Morocco 2019 only - Jun 9 2:00 0 -
Rule Morocco 2020 only - Apr 19 3:00 -1:00 -
Rule Morocco 2020 only - May 24 2:00 0 -
Rule Morocco 2020 only - May 31 2:00 0 -
Rule Morocco 2021 only - Apr 11 3:00 -1:00 -
Rule Morocco 2021 only - May 16 2:00 0 -
Rule Morocco 2022 only - Mar 27 3:00 -1:00 -
Expand All @@ -955,7 +961,7 @@ 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 - Feb 27 2:00 0 -
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 -
Expand All @@ -971,7 +977,7 @@ 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 2 2:00 0 -
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 -
Expand All @@ -987,7 +993,7 @@ 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 6 2:00 0 -
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 -
Expand All @@ -1003,7 +1009,7 @@ 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 11 2:00 0 -
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 -
Expand All @@ -1019,7 +1025,7 @@ 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 16 2:00 0 -
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 -
Expand All @@ -1029,13 +1035,13 @@ 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 20 2:00 0 -
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 19 2:00 0 -
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 -
Expand All @@ -1045,13 +1051,13 @@ 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 - Oct 25 2:00 0 -
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 23 2:00 0 -
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 -
Expand All @@ -1061,7 +1067,7 @@ 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 - Jul 30 2:00 0 -
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 -
Expand All @@ -1077,7 +1083,7 @@ 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 4 2:00 0 -
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
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