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Morocco's Ramadan-based transitions expand to Saturday-Saturday.
(Thanks to Milamber Space Network.) * africa (Morocco): 2014 transitions are Jun 28 03:00 and Aug 2 02:00. Guess a similar pattern for future years. Fix white space to be more consistent. * NEWS: Document this.
This commit is contained in:
Paul Eggert
10
NEWS
10
NEWS
@@ -5,8 +5,14 @@ Unreleased, experimental changes
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Changes affecting near-future time stamps
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Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
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(Thanks to Imed Chihi.) Guess that transitions in future years
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will follow a similar pattern.
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(Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily
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switch to standard time at 24:00 the last Thursday before Ramadan, and
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back to DST at 00:00 the first Friday after Ramadan.
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Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks
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to Milamber Space Network.) Guess that from 2015 on Morocco will
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temporarily switch to standard time at 03:00 the last Saturday before
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Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
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Changes affecting past time stamps
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143
africa
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africa
@@ -359,15 +359,13 @@ Rule Egypt 2007 only - Sep Thu>=1 24:00 0 -
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# Sarah El Deeb and Lee Keath of AP report that the Egyptian government says
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# the change is because of blackouts in Cairo, even though Ahram Online (cited
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# above) says DST had no affect on electricity consumption. There is
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# no information about when DST will end this fall. See:
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# http://abcnews.go.com/International/wireStory/el-sissi-pushes-egyptians-line-23614833
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#
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# For now, guess that later transitions will use 2010's rules, and that
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# Egypt will agree with Morocco (see below) about the date Ramadan starts and
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# ends, though (unlike Morocco) it will switch at 24:00 the last Thursday before
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# Ramadan, and at 00:00 the first Friday after Ramadan.
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# To estimate what the Egyptian government will do in future years,
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# For now, guess that later spring and fall transitions will use
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# 2010's rules, and guess that Egypt will switch to standard time at
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# 24:00 the last Thursday before Ramadan, and back to DST at 00:00 the
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# first Friday after Ramadan. To implement this,
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# transition dates for 2015 through 2037 were determined by running
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# the following program under GNU Emacs 24.3, with the results integrated
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# by hand into the table below. Ramadan again intrudes on the guessed
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@@ -947,39 +945,36 @@ Zone Indian/Mayotte 3:00:56 - LMT 1911 Jul # Mamoutzou
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# From Sebastien Willemijns (2014-03-18):
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# http://www.afriquinfos.com/articles/2014/3/18/maroc-heure-dete-avancez-tous-horloges-247891.asp
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# From Paul Eggert (2014-03-19):
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# To estimate what the Moroccan government will do in future years,
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# transition dates for 2014 through 2038 were determined by running
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# the following program under GNU Emacs 24.3:
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#
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# (let ((islamic-year 1435))
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# (while (< islamic-year 1461)
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# (let ((a
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# (calendar-gregorian-from-absolute
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# (calendar-islamic-to-absolute (list 9 1 islamic-year))))
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# (b
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# (calendar-gregorian-from-absolute
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# (calendar-islamic-to-absolute (list 10 1 islamic-year)))))
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# (insert
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# (format
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# (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t %2d\t 3:00\t0\t-\n"
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# "Rule\tMorocco\t%d\tonly\t-\t%s\t %2d\t 2:00\t1:00\tS\n")
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# (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
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# (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
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# From Milamber Space Network (2014-06-05):
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# The Moroccan government has recently announced that the country will return
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# to standard time at 03:00 on Saturday, June 28, 2014 local time.... DST
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# will resume again at 02:00 on Saturday, August 2, 2014....
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# http://www.mmsp.gov.ma/fr/actualites.aspx?id=586
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# From Paul Eggert (2014-06-05):
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# For now, guess that later spring and fall transitions will use 2014's rules,
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# and guess that Morocco will switch to standard time at 03:00 the last
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# Saturday before Ramadan, and back to DST at 02:00 the first Saturday after
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# Ramadan. To implement this, transition dates for 2015 through 2037 were
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# determined by running the following program under GNU Emacs 24.3, with the
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# results integrated by hand into the table below.
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# (let ((islamic-year 1436))
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# (while (< islamic-year 1460)
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# (let ((a (calendar-islamic-to-absolute (list 9 1 islamic-year)))
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# (b (calendar-islamic-to-absolute (list 10 1 islamic-year)))
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# (saturday 6))
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# (while (/= saturday (mod (setq a (1- a)) 7)))
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# (while (/= saturday (mod b 7))
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# (setq b (1+ b)))
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# (setq a (calendar-gregorian-from-absolute a))
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# (setq b (calendar-gregorian-from-absolute b))
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# (insert
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# (format
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# (concat "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 3:00\t0\t-\n"
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# "Rule\tMorocco\t%d\tonly\t-\t%s\t%2d\t 2:00\t1:00\tS\n")
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# (car (cdr (cdr a))) (calendar-month-name (car a) t) (car (cdr a))
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# (car (cdr (cdr b))) (calendar-month-name (car b) t) (car (cdr b)))))
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# (setq islamic-year (+ 1 islamic-year))))
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#
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# with spring-forward transitions removed for 2023-2025, when the
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# normal spring-forward date falls during the estimated Ramadan; with
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# all transitions removed for 2026-2035, where the estimated Ramadan
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# falls entirely outside daylight-saving time; and with fall-back
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# transitions removed for 2036-2037, where the normal fall-back
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# date falls during the estimated Ramadan. Normally, the table would
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# stop after 2037 because 32-bit time_t values roll around early in 2038,
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# but that would imply a prediction of perpetual DST after March 2038
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# due to the year-2037 glitches. So, this table instead stops after
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# 2038, the first non-glitchy year after the 32-bit rollover.
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# An advantage of stopping after 2038 is that it lets zic guess
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# TZ='WET0WEST,M3.5.0,M10.5.0/3' for time stamps far in the future.
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# RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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@@ -1001,46 +996,44 @@ Rule Morocco 1978 only - Aug 4 0:00 0 -
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Rule Morocco 2008 only - Jun 1 0:00 1:00 S
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Rule Morocco 2008 only - Sep 1 0:00 0 -
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Rule Morocco 2009 only - Jun 1 0:00 1:00 S
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Rule Morocco 2009 only - Aug 21 0:00 0 -
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Rule Morocco 2009 only - Aug 21 0:00 0 -
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Rule Morocco 2010 only - May 2 0:00 1:00 S
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Rule Morocco 2010 only - Aug 8 0:00 0 -
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Rule Morocco 2011 only - Apr 3 0:00 1:00 S
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Rule Morocco 2011 only - Jul 31 0 0 -
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Rule Morocco 2012 2013 - Apr lastSun 2:00 1:00 S
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Rule Morocco 2012 only - Sep 30 3:00 0 -
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Rule Morocco 2012 only - Jul 20 3:00 0 -
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Rule Morocco 2012 only - Aug 20 2:00 1:00 S
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Rule Morocco 2013 only - Jul 7 3:00 0 -
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Rule Morocco 2013 only - Aug 10 2:00 1:00 S
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Rule Morocco 2013 2035 - Oct lastSun 3:00 0 -
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Rule Morocco 2014 2022 - Mar lastSun 2:00 1:00 S
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Rule Morocco 2014 only - Jun 29 3:00 0 -
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Rule Morocco 2014 only - Jul 29 2:00 1:00 S
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Rule Morocco 2015 only - Jun 18 3:00 0 -
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Rule Morocco 2015 only - Jul 18 2:00 1:00 S
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Rule Morocco 2016 only - Jun 7 3:00 0 -
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Rule Morocco 2016 only - Jul 7 2:00 1:00 S
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Rule Morocco 2017 only - May 27 3:00 0 -
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Rule Morocco 2017 only - Jun 26 2:00 1:00 S
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Rule Morocco 2018 only - May 16 3:00 0 -
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Rule Morocco 2018 only - Jun 15 2:00 1:00 S
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Rule Morocco 2019 only - May 6 3:00 0 -
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Rule Morocco 2019 only - Jun 5 2:00 1:00 S
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Rule Morocco 2020 only - Apr 24 3:00 0 -
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Rule Morocco 2020 only - May 24 2:00 1:00 S
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Rule Morocco 2021 only - Apr 13 3:00 0 -
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Rule Morocco 2021 only - May 13 2:00 1:00 S
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Rule Morocco 2022 only - Apr 3 3:00 0 -
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Rule Morocco 2022 only - May 3 2:00 1:00 S
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Rule Morocco 2023 only - Apr 22 2:00 1:00 S
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Rule Morocco 2024 only - Apr 10 2:00 1:00 S
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Rule Morocco 2025 only - Mar 31 2:00 1:00 S
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Rule Morocco 2026 max - Mar lastSun 2:00 1:00 S
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Rule Morocco 2036 only - Oct 21 3:00 0 -
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Rule Morocco 2037 only - Oct 11 3:00 0 -
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Rule Morocco 2038 only - Sep 30 3:00 0 -
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Rule Morocco 2038 only - Oct 30 2:00 1:00 S
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Rule Morocco 2038 max - Oct lastSun 3:00 0 -
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Rule Morocco 2011 only - Jul 31 0 0 -
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Rule Morocco 2012 2013 - Apr lastSun 2:00 1:00 S
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Rule Morocco 2012 only - Sep 30 3:00 0 -
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Rule Morocco 2012 only - Jul 20 3:00 0 -
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Rule Morocco 2012 only - Aug 20 2:00 1:00 S
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Rule Morocco 2013 only - Jul 7 3:00 0 -
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Rule Morocco 2013 only - Aug 10 2:00 1:00 S
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Rule Morocco 2013 max - Oct lastSun 3:00 0 -
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Rule Morocco 2014 2022 - Mar lastSun 2:00 1:00 S
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Rule Morocco 2014 only - Jun 28 3:00 0 -
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Rule Morocco 2014 only - Aug 2 2:00 1:00 S
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Rule Morocco 2015 only - Jun 13 3:00 0 -
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Rule Morocco 2015 only - Jul 18 2:00 1:00 S
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Rule Morocco 2016 only - Jun 4 3:00 0 -
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Rule Morocco 2016 only - Jul 9 2:00 1:00 S
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Rule Morocco 2017 only - May 20 3:00 0 -
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Rule Morocco 2017 only - Jul 1 2:00 1:00 S
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Rule Morocco 2018 only - May 12 3:00 0 -
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Rule Morocco 2018 only - Jun 16 2:00 1:00 S
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Rule Morocco 2019 only - May 4 3:00 0 -
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Rule Morocco 2019 only - Jun 8 2:00 1:00 S
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Rule Morocco 2020 only - Apr 18 3:00 0 -
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Rule Morocco 2020 only - May 30 2:00 1:00 S
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Rule Morocco 2021 only - Apr 10 3:00 0 -
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Rule Morocco 2021 only - May 15 2:00 1:00 S
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Rule Morocco 2022 only - Apr 2 3:00 0 -
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Rule Morocco 2022 only - May 7 2:00 1:00 S
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Rule Morocco 2023 only - Apr 22 2:00 1:00 S
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Rule Morocco 2024 only - Apr 13 2:00 1:00 S
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Rule Morocco 2025 only - Apr 5 2:00 1:00 S
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Rule Morocco 2026 max - Mar lastSun 2:00 1:00 S
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Rule Morocco 2035 only - Oct 27 3:00 0 -
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Rule Morocco 2036 only - Oct 18 3:00 0 -
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Rule Morocco 2037 only - Oct 10 3:00 0 -
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26
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