From c9ebcee69b5f692cefc006ba738af70aa9970c80 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Wed, 7 May 2014 18:09:14 -0700 Subject: [PATCH] africa: Egypt resumes DST on May 15 (Thanks to Ahmad El-Dardiry.) * NEWS: Document this. * africa (Egypt): Add rules for 2014 through 2038. They all involve some guesswork, unfortunately. --- NEWS | 10 ++++++++++ africa | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/NEWS b/NEWS index 2c289f5..3fdf592 100644 --- a/NEWS +++ b/NEWS @@ -3,6 +3,16 @@ News for the tz database Unreleased, experimental changes + Changes affecting near-future time stamps + + Egypt observes DST starting May 15. (Thanks to Ahmad El-Dardiry.) + Details have not been announced, except that DST will not be observed + during Ramadan. Guess that DST will stop during the same Ramadan dates as + Morocco, and that Egypt's future spring and fall transitions will be the + same as 2010 when it last observed DST, namely April's last Friday at + 00:00 to September's last Thursday at 23:00 standard time. Also, guess + that Ramadan transitions will be at 00:00 standard time. + Changes affecting code zic now generates transitions for minimum time values, eliminating guesswork diff --git a/africa b/africa index fbf0b65..eefaf0d 100644 --- a/africa +++ b/africa @@ -335,11 +335,52 @@ Rule Egypt 2007 only - Sep Thu>=1 23:00s 0 - # http://www.worldtimezone.com/dst_news/dst_news_egypt02.html # +# From Ahmad El-Dardiry (2014-05-07): +# Egypt is to change back to Daylight system on May 15 +# http://english.ahram.org.eg/NewsContent/1/64/100735/Egypt/Politics-/Egypts-government-to-reapply-daylight-saving-time-.aspx + +# From Paul Eggert (2014-05-07): +# Sarah El Deeb and Lee Keath of AP report that the Egyptian government says +# the change is because of blackouts in Cairo, even though Ahram Online (cited +# above) says DST had no affect on electricity consumption. The AP story says +# DST will not be observed during Ramadan. There is no information about when +# DST will end. See: +# http://abcnews.go.com/International/wireStory/el-sissi-pushes-egyptians-line-23614833 +# +# For now, assume DST will start at 00:00 on May 15, and guess that in future +# years DST will start and end using the same rules as 2010, and guess that +# Egypt will agree with Morocco (see below) about the date Ramadan starts and +# ends, though (unlike Morocco) it will switch at 00:00 standard time. In +# Egypt the spring-forward transitions are removed for 2020-2022, when the +# guessed spring-forward date falls during the estimated Ramadan, and all +# transitions removed for 2023-2038, where the estimated Ramadan falls entirely +# outside the guessed daylight-saving time. Ramadan intrudes on the guessed +# DST starting in 2039, but that's beyond our somewhat-arbitrary cutoff. + Rule Egypt 2008 only - Aug lastThu 23:00s 0 - Rule Egypt 2009 only - Aug 20 23:00s 0 - Rule Egypt 2010 only - Aug 11 0:00 0 - Rule Egypt 2010 only - Sep 10 0:00 1:00 S Rule Egypt 2010 only - Sep lastThu 23:00s 0 - +Rule Egypt 2014 only - May 15 0:00s 1:00 S +Rule Egypt 2014 only - Jun 29 0:00s 0 - +Rule Egypt 2014 only - Jul 29 0:00s 1:00 S +Rule Egypt 2014 max - Sep lastThu 23:00s 0 - +Rule Egypt 2015 2019 - Apr lastFri 0:00s 1:00 S +Rule Egypt 2015 only - Jun 18 0:00s 0 - +Rule Egypt 2015 only - Jul 18 0:00s 1:00 S +Rule Egypt 2016 only - Jun 7 0:00s 0 - +Rule Egypt 2016 only - Jul 7 0:00s 1:00 S +Rule Egypt 2017 only - May 27 0:00s 0 - +Rule Egypt 2017 only - Jun 26 0:00s 1:00 S +Rule Egypt 2018 only - May 16 0:00s 0 - +Rule Egypt 2018 only - Jun 15 0:00s 1:00 S +Rule Egypt 2019 only - May 6 0:00s 0 - +Rule Egypt 2019 only - Jun 5 0:00s 1:00 S +Rule Egypt 2020 only - May 24 0:00s 1:00 S +Rule Egypt 2021 only - May 13 0:00s 1:00 S +Rule Egypt 2022 only - May 3 0:00s 1:00 S +Rule Egypt 2023 max - Apr lastFri 0:00s 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Cairo 2:05:09 - LMT 1900 Oct -- 1.9.1