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*** 1119,1128 ****
--- 1119,1182 ----
-4:00 - AMT 2013 Nov 10
-5:00 - ACT
# Chile
+ # From Paul Eggert (2015-04-03):
+ # Shanks & Pottenger says America/Santiago introduced standard time in
+ # 1890 and rounds its UTC offset to 70W40; guess that in practice this
+ # was the same offset as in 1916-1919. It also says Pacific/Easter
+ # standardized on 109W22 in 1890; assume this didn't change the clocks.
+ #
+ # Dates for America/Santiago from 1910 to 2004 are primarily from
+ # the following source, cited by Oscar van Vlijmen (2006-10-08):
+ # [1] Chile Law
+ # http://www.webexhibits.org/daylightsaving/chile.html
+ # This contains a copy of a this official table:
+ # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
+ # http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
+ # [1] needs several corrections, though.
+ #
+ # The first set of corrections is from:
+ # [2] History of the Official Time of Chile
+ # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See:
+ # http://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
+ # This is an English translation of:
+ # Historia de la hora oficial de Chile (retrieved 2012-10-24). See:
+ # http://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
+ # A fancier Spanish version (requiring mouse-clicking) is at:
+ # http://www.horaoficial.cl/historia_hora.html
+ # Conflicts between [1] and [2] were resolved as follows:
+ #
+ # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
+ # Boletín Nº 1, Aviso Nº 1 (1910). Go with [2].
+ #
+ # - [1] says SMT was -4:42:45, [2] says Chile's official time from
+ # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National
+ # Astronomical Observatory (OAN), then located in what is now
+ # Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46.
+ #
+ # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
+ # Boletín Nº 22, Aviso Nº 129/1918 (1918-08-23). Go with [2].
+ #
+ # - [1] does not give times for transitions; assume they occur
+ # at midnight mainland time, the current common practice. However,
+ # go with [2]'s specification of 23:00 for the 1947-05-21 transition.
+ #
+ # Another correction to [1] is from Jesper Nørgaard Welen, who
+ # wrote (2006-10-08), "I think that there are some obvious mistakes in
+ # the suggested link from Oscar van Vlijmen,... for instance entry 66
+ # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
+ # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
+ # respectively), but anyhow it clears up some doubts too."
+ #
+ # Data for Pacific/Easter from 1910 through 1967 come from Shanks &
+ # Pottenger. After that, for lack of better info assume
+ # Pacific/Easter is always two hours behind America/Santiago;
+ # this is known to work for DST transitions starting in 2008 and
+ # may well be true for earlier transitions.
+
# From Eduardo Krell (1995-10-19):
# The law says to switch to DST at midnight [24:00] on the second SATURDAY
# of October.... The law is the same for March and October.
# (1998-09-29):
# Because of the drought this year, the government decided to go into
*** 1131,1212 ****
# From Julio I. Pacheco Troncoso (1999-03-18):
# Because of the same drought, the government decided to end DST later,
# on April 3, (one-time change).
- # From Oscar van Vlijmen (2006-10-08):
- # http://www.horaoficial.cl/cambio.htm
-
- # From Jesper Nørgaard Welen (2006-10-08):
- # I think that there are some obvious mistakes in the suggested link
- # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
- # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
- # (they should have been 1990-09-15 and 1990-09-16 respectively), but
- # anyhow it clears up some doubts too.
-
- # From Paul Eggert (2014-08-12):
- # The following data entries for Chile and America/Santiago are from
- # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
- # Jesper Nørgaard Welen. The data entries for Pacific/Easter are from Shanks
- # & Pottenger, except with DST transitions after 1932 cloned from
- # America/Santiago. The pre-1980 Pacific/Easter data entries are dubious,
- # but we have no other source.
-
# From Germán Poo-Caamaño (2008-03-03):
# Due to drought, Chile extends Daylight Time in three weeks. This
# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
# and Saturday 3/29 at 22:00 for Pacific/Easter)
# The Supreme Decree is located at
# http://www.shoa.cl/servicios/supremo316.pdf
! # and the instructions for 2008 are located in:
! # http://www.horaoficial.cl/cambio.htm
!
# From José Miguel Garrido (2008-03-05):
- # ...
- # You could see the announces of the change on
# http://www.shoa.cl/noticias/2008/04hora/hora.htm
# From Angel Chiang (2010-03-04):
# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
- # (in Spanish, last paragraph).
#
- # This is breaking news. There should be more information available later.
-
# From Arthur David Olson (2010-03-06):
# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
- # From Glenn Eychaner (2011-03-02):
- # It appears that the Chilean government has decided to postpone the
- # change from summer time to winter time again, by three weeks to April
- # 2nd:
- # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
- #
- # This is not yet reflected in the official "cambio de hora" site, but
- # probably will be soon:
- # http://www.horaoficial.cl/cambio.htm
-
- # From Arthur David Olson (2011-03-02):
- # The emol.com article mentions a water shortage as the cause of the
- # postponement, which may mean that it's not a permanent change.
-
# From Glenn Eychaner (2011-03-28):
- # The article:
# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
- #
# In English:
# Chile's clocks will go back an hour this year on the 7th of May instead
# of this Saturday. They will go forward again the 3rd Saturday in
! # August, not in October as they have since 1968. This is a pilot plan
! # which will be reevaluated in 2012.
# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
# As stated in the website of the Chilean Energy Ministry
# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
# The Chilean Government has decided to postpone the entrance into winter time
! # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
! # been yet formalized but it will within the next days.
# Quote from the website communication:
#
# 6. For the year 2012, the dates of entry into winter time will be as follows:
# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
--- 1185,1223 ----
# From Julio I. Pacheco Troncoso (1999-03-18):
# Because of the same drought, the government decided to end DST later,
# on April 3, (one-time change).
# From Germán Poo-Caamaño (2008-03-03):
# Due to drought, Chile extends Daylight Time in three weeks. This
# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
# and Saturday 3/29 at 22:00 for Pacific/Easter)
# The Supreme Decree is located at
# http://www.shoa.cl/servicios/supremo316.pdf
! #
# From José Miguel Garrido (2008-03-05):
# http://www.shoa.cl/noticias/2008/04hora/hora.htm
# From Angel Chiang (2010-03-04):
# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
#
# From Arthur David Olson (2010-03-06):
# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
# From Glenn Eychaner (2011-03-28):
# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
# In English:
# Chile's clocks will go back an hour this year on the 7th of May instead
# of this Saturday. They will go forward again the 3rd Saturday in
! # August, not in October as they have since 1968.
# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
# As stated in the website of the Chilean Energy Ministry
# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
# The Chilean Government has decided to postpone the entrance into winter time
! # (to leave DST) from March 11 2012 to April 28th 2012....
# Quote from the website communication:
#
# 6. For the year 2012, the dates of entry into winter time will be as follows:
# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
*** 1235,1269 ****
# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
#
# From Paul Eggert (2015-03-03):
# For now, assume that the extension will persist indefinitely.
- # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
- # 'antarctica' file.
-
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
Rule Chile 1928 1932 - Apr 1 0:00 0 -
- Rule Chile 1942 only - Jun 1 4:00u 0 -
- Rule Chile 1942 only - Aug 1 5:00u 1:00 S
- Rule Chile 1946 only - Jul 15 4:00u 1:00 S
- Rule Chile 1946 only - Sep 1 3:00u 0:00 -
- Rule Chile 1947 only - Apr 1 4:00u 0 -
Rule Chile 1968 only - Nov 3 4:00u 1:00 S
Rule Chile 1969 only - Mar 30 3:00u 0 -
Rule Chile 1969 only - Nov 23 4:00u 1:00 S
Rule Chile 1970 only - Mar 29 3:00u 0 -
Rule Chile 1971 only - Mar 14 3:00u 0 -
Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
Rule Chile 1973 only - Sep 30 4:00u 1:00 S
Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1987 only - Apr 12 3:00u 0 -
! Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
! Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
! Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
! Rule Chile 1990 only - Mar 18 3:00u 0 -
Rule Chile 1990 only - Sep 16 4:00u 1:00 S
Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1997 only - Mar 30 3:00u 0 -
Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
--- 1246,1270 ----
# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
#
# From Paul Eggert (2015-03-03):
# For now, assume that the extension will persist indefinitely.
# 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 -
Rule Chile 1968 only - Nov 3 4:00u 1:00 S
Rule Chile 1969 only - Mar 30 3:00u 0 -
Rule Chile 1969 only - Nov 23 4:00u 1:00 S
Rule Chile 1970 only - Mar 29 3:00u 0 -
Rule Chile 1971 only - Mar 14 3:00u 0 -
Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
Rule Chile 1973 only - Sep 30 4:00u 1:00 S
Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1987 only - Apr 12 3:00u 0 -
! Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
! Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1990 only - Sep 16 4:00u 1:00 S
Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
Rule Chile 1997 only - Mar 30 3:00u 0 -
Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
*** 1282,1309 ****
Rule Chile 2012 2014 - Sep Sun>=2 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]
Zone America/Santiago -4:42:46 - LMT 1890
! -4:42:46 - SMT 1910 # Santiago Mean Time
-5:00 - CLT 1916 Jul 1 # Chile Time
! -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
! -4:00 - CLT 1919 Jul 1 # Chile Time
! -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
! -5:00 Chile CL%sT 1947 May 22 # Chile Time
-4:00 Chile CL%sT 2015 Apr 26 3:00u
-3:00 - CLT
! Zone Pacific/Easter -7:17:44 - 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
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
# and Antarctic bases, are like America/Santiago.
# Colombia
# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
--- 1283,1335 ----
Rule Chile 2012 2014 - Sep Sun>=2 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]
Zone America/Santiago -4:42:46 - LMT 1890
! -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
-5:00 - CLT 1916 Jul 1 # Chile Time
! -4:42:46 - SMT 1918 Sep 10
! -4:00 - CLT 1919 Jul 1
! -4:42:46 - SMT 1927 Sep 1
! -5:00 Chile CL%sT 1932 Sep 1
! -4:00 - CLT 1942 Jun 1
! -5:00 - CLT 1942 Aug 1
! -4:00 - CLT 1946 Jul 15
! -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
! 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
#
# Salas y Gómez Island is uninhabited.
# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
# and Antarctic bases, are like America/Santiago.
+ # Antarctic base using South American rules
+ # (See the file 'antarctica' for more.)
+ #
+ # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
+ #
+ # From Ethan Dicks (1996-10-06):
+ # It keeps the same time as Punta Arenas, Chile, because, just like us
+ # and the South Pole, that's the other end of their supply line....
+ # I verified with someone who was there that since 1980,
+ # Palmer has followed Chile. Prior to that, before the Falklands War,
+ # Palmer used to be supplied from Argentina.
+ #
+ # Zone NAME GMTOFF RULES FORMAT [UNTIL]
+ 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
+
# Colombia
# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
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