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Chile reverts from permanent to seasonal DST

(Thanks to Juan Correa for the heads-up, and to Tim Parenti for
corrections.)
* NEWS: Documen this.
* southamerica (Chile): Revert to seasonal DST as of 2016.
(America/Santiago, Pacific/Easter, Antarctica/Palmer):
Simplify by assuming DST since 2014.
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eggert committed Mar 17, 2016
1 parent e2804e9 commit 1b2c46e15cb694148b06d6f5f7fffec85f01e667
Showing with 29 additions and 7 deletions.
  1. +8 −0 NEWS
  2. +21 −7 southamerica
8 NEWS
@@ -6,6 +6,14 @@ Unreleased, experimental changes

Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.)

Chile reverts from permanent to seasonal DST. (Thanks to Juan
Correa for the heads-up, and to Tim Parenti for corrections.)
Guess that future America/Santiago and Antarctica/Palmer
transitions are August's and May's second Saturdays at 24:00 local
time, and that Pacific/Easter stays two hours behind. 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

@@ -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 transitions are May's and August's second
# Saturdays at 24:00 local time, and that Pacific/Easter always stays 2
# hours behind.

# 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 Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
@@ -1298,8 +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

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