[tz] Chile goes back to DST (...)

Tue Mar 15 05:37:13 UTC 2016

On 14 Mar 2016 04:03, Paul Eggert wrote:
> Thanks for the heads-up; attached is a proposed patch.

This seems to forget Antarctica/Palmer, which (in the absence of 
contrary evidence) would presumably observe the same changes. Further 
patch 0002 attached.

(Re-sent 0001 also fixes a small typo in Paul's commit message.)

--
Tim Parenti
-------------- next part --------------
From 95b7d1b457729c4299492e9976fe5cf69eaa4fea Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Mon, 14 Mar 2016 01:00:40 -0700
Subject: Chile stops observing DST in winter 2016

(Thanks to Juan Correa.)
* NEWS: Document this.
* southamerica (Chile, America/Santiago, Pacific/Easter):
Say that DST continued from 2014 until now.  Resume DST
schedule this year.
---
 NEWS         | 12 ++++++++++++
 southamerica | 25 ++++++++++++++++++++-----
 2 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/NEWS b/NEWS
index 2747999..a94c415 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,17 @@
 News for the tz database
 
+Unreleased, experimental changes
+
+  Changes affecting future time stamps
+
+    Chile stops observing DST in winter 2016.  (Thanks to Juan Correa.)
+    Guess that future America/Santiago transitions are May and August,
+    the 2nd Saturday at 24:00 local time, and that Pacific/Easter
+    always stays 2 hours behind America/Santiago.  Also, call the
+    period from 2014-09-07 through 2016-05-14 daylight saving time
+    instead of standard time, as that seems more appropriate now.
+
+
 Release 2016b - 2016-03-12 17:30:14 -0800
 
   Changes affecting future time stamps
diff --git a/southamerica b/southamerica
index 50d118e..d9e79f0 100644
--- a/southamerica
+++ b/southamerica
@@ -1221,6 +1221,21 @@ Zone America/Rio_Branco	-4:31:12 -	LMT	1914
 # From Paul Eggert (2015-03-03):
 # For now, assume that the extension will persist indefinitely.
 
+# From Juan Correa (2016-03-13):
+# Today the Chilean Ministry of Energy announced that they will go back to a
+# DST scheme this year.  That means clocks will go back 1 hour at 00:00 May
+# 15th (jumping back to May 14th); and will go forward by 1 hour on 00:00,
+# August 14th.  This was decided after a public outcry during winter, when the
+# sunrise for Santiago went as late as 08:45....
+# http://www.soychile.cl/Santiago/Sociedad/2016/03/13/380779/Vuelve-el-horario-de-invierno-a-partir-de-la-segunda-semana-de-mayo.aspx
+# http://www.biobiochile.cl/2016/03/13/gobierno-retrocede-y-decreta-el-regreso-del-horario-de-invierno.shtml
+# http://www.t13.cl/noticia/nacional/chile-volvera-implementar-horario-invierno
+#
+# From Paul Eggert (2016-03-14):
+# For now, guess that future America/Santiago transitions are May and August,
+# the 2nd Saturday at 24:00 local time, and that Pacific/Easter always stays 2
+# hours behind America/Santiago.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	S
 Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
@@ -1252,8 +1267,10 @@ Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
 Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
 Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
 Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	S
-Rule	Chile	2012	2015	-	Apr	Sun>=23	3:00u	0	-
+Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
 Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	S
+Rule	Chile	2016	max	-	May	Sun>=9	3:00u	0	-
+Rule	Chile	2016	max	-	Aug	Sun>=9	4:00u	1:00	S
 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
 # (1996-09) says 1998-03-08.  Ignore these.
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1270,13 +1287,11 @@ Zone America/Santiago	-4:42:46 -	LMT	1890
 			-4:00	1:00	CLST	1946 Sep  1 # central Chile
 			-4:00	-	CLT	1947 Apr  1
 			-5:00	-	CLT	1947 May 21 23:00
-			-4:00	Chile	CL%sT	2015 Apr 26  3:00u
-			-3:00	-	CLT
+			-4:00	Chile	CL%sT
 Zone Pacific/Easter	-7:17:28 -	LMT	1890
 			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
 			-7:00	Chile	EAS%sT	1982 Mar 14 3:00u # Easter Time
-			-6:00	Chile	EAS%sT	2015 Apr 26 3:00u
-			-5:00	-	EAST
+			-6:00	Chile	EAS%sT
 #
 # Salas y GÃ³mez Island is uninhabited.
 # Other Chilean locations, including Juan FernÃ¡ndez Is, Desventuradas Is,
-- 
2.7.0

-------------- next part --------------
From e87e4dfd2a3af12c1cfa6deced6ce343dc480cb1 Mon Sep 17 00:00:00 2001
From: Tim Parenti <tim at timtimeonline.com>
Date: Tue, 15 Mar 2016 01:25:40 -0400
Subject: Antarctica/Palmer observes Chile rules through 2014 to 2016.

* southamerica (Antarctica/Palmer): Continue using Chile rules through
the 2014 to 2016 period, like America/Santiago.
* NEWS: Document this.
---
 NEWS         | 9 +++++----
 southamerica | 3 +--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/NEWS b/NEWS
index a94c415..16b51bf 100644
--- a/NEWS
+++ b/NEWS
@@ -6,10 +6,11 @@ Unreleased, experimental changes
 
     Chile stops observing DST in winter 2016.  (Thanks to Juan Correa.)
     Guess that future America/Santiago transitions are May and August,
-    the 2nd Saturday at 24:00 local time, and that Pacific/Easter
-    always stays 2 hours behind America/Santiago.  Also, call the
-    period from 2014-09-07 through 2016-05-14 daylight saving time
-    instead of standard time, as that seems more appropriate now.
+    the 2nd Saturday at 24:00 local time, that Antarctica/Palmer will
+    follow likewise, and that Pacific/Easter always stays 2 hours behind
+    America/Santiago.  Also, call the period from 2014-09-07 through
+    2016-05-14 daylight saving time instead of standard time, as that seems
+    more appropriate now.
 
 
 Release 2016b - 2016-03-12 17:30:14 -0800
diff --git a/southamerica b/southamerica
index d9e79f0..2d48567 100644
--- a/southamerica
+++ b/southamerica
@@ -1313,8 +1313,7 @@ Zone Pacific/Easter	-7:17:28 -	LMT	1890
 Zone Antarctica/Palmer	0	-	zzz	1965
 			-4:00	Arg	AR%sT	1969 Oct  5
 			-3:00	Arg	AR%sT	1982 May
-			-4:00	Chile	CL%sT	2015 Apr 26 3:00u
-			-3:00	-	CLT
+			-4:00	Chile	CL%sT
 
 # Colombia
 
-- 
2.7.0

