e073c23933
Greenland change should affect only America/Nuuk; The northern edge of Chihuahua changes to US rules Signed-off-by: qinyu <qinyu32@huawei.com>
115 lines
4.2 KiB
Diff
115 lines
4.2 KiB
Diff
From 2f171a25cc837cca7be0bad9c6d3ce73d52784a9 Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Wed, 28 Sep 2022 20:08:31 -0700
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Subject: [PATCH] Treat 1931 changes in Mexico as DST
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Reference: https://github.com/eggert/tz/commit/ff2e2a09a7609efb4826b1083e880cfc1913fb92
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Conflict: remove NEWS
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Mexico’s Chamber of Deputies was supposed to vote today on
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legislation abolishing DST in most of Mexico. Although the vote
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was delayed due to Internet problems, news coverage of the
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non-event led me to review our sources for DST in Mexico, and I
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found that tzdb considered the transitions in 1931 to be two
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changes to standard time, whereas it is considered to be DST in
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today’s news coverage, as well as in our main source, the history
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of Mexican local time published by the Investigation and Analysis
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Service of the Mexican Library of Congress. Fix this by
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considering the 1931 changes to be DST, not standard time.
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* NEWS: Mention this.
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* northamerica (Mexico): Add DST rules for 1931.
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(America/Mexico_City, America/Ojinaga, America/Chihuahua)
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(America/Hermosillo, America/Mazatlan, America/Bahia_Banderas):
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Use them.
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---
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northamerica | 26 ++++++++------------------
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1 file changed, 8 insertions(+), 18 deletions(-)
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diff --git a/northamerica b/northamerica
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index 0ceeeea..34ebca9 100644
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--- a/northamerica
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+++ b/northamerica
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@@ -2623,6 +2623,8 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
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# and in addition changes all of Chihuahua to -06 with no DST.
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# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
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+Rule Mexico 1931 only - May 1 23:00 1:00 D
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+Rule Mexico 1931 only - Oct 1 0:00 0 S
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Rule Mexico 1939 only - Feb 5 0:00 1:00 D
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Rule Mexico 1939 only - Jun 25 0:00 0 S
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Rule Mexico 1940 only - Dec 9 0:00 1:00 D
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@@ -2673,9 +2675,7 @@ Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
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Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 Mexico C%sT 2001 Sep 30 2:00
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-6:00 - CST 2002 Feb 20
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-6:00 Mexico C%sT
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@@ -2686,9 +2686,7 @@ Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
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Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 - CST 1996
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-6:00 Mexico C%sT 1998
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-6:00 - CST 1998 Apr Sun>=1 3:00
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@@ -2699,9 +2697,7 @@ Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
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Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 - CST 1996
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-6:00 Mexico C%sT 1998
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-6:00 - CST 1998 Apr Sun>=1 3:00
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@@ -2711,9 +2707,7 @@ Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
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Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 - CST 1942 Apr 24
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-7:00 - MST 1949 Jan 14
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-8:00 - PST 1970
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@@ -2751,9 +2745,7 @@ Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
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Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 - CST 1942 Apr 24
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-7:00 - MST 1949 Jan 14
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-8:00 - PST 1970
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@@ -2763,9 +2755,7 @@ Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
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Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00
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-7:00 - MST 1927 Jun 10 23:00
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-6:00 - CST 1930 Nov 15
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- -7:00 - MST 1931 May 1 23:00
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- -6:00 - CST 1931 Oct
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- -7:00 - MST 1932 Apr 1
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+ -7:00 Mexico M%sT 1932 Apr 1
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-6:00 - CST 1942 Apr 24
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-7:00 - MST 1949 Jan 14
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-8:00 - PST 1970
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--
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2.33.0
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