I think that there are some obvious mistakes in the suggested link from Oscar van Vlijmen (thanks for that, Oscar!), for instance entry 66 says that GMT-4 ended 12-Sep-1990 while entry 67 only begins GMT-3 at 15-Sep-1990 (they should have been 15-Sep-1990 and 16-Sep-1990 respectively), but anyhow it clears up some doubts too. My new proposal (surely not the last - don't have much fe de errata!) is the following: # 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 1973 only - Sep 30 4:00u 1:00 S Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1987 only - Apr 12 3:00u 0 - Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 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 - Sep 27 4:00u 1:00 S Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - Rule Chile 1999 only - Apr 4 3:00u 0 - Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - # 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 - CL%sT 1916 Jul 1 # Chile Time -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time -4:00 - CL%sT 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 Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri -7:17:28 - MMT 1932 Sep # Mataveri Mean Time -7:00 Chile EAS%sT 1982 Jan 18 21:00 # Easter I Time -6:00 Chile EAS%sT Note that we also have to change the entries for Palmer antarctic station once the above has been cleaned up. Regards, - Jesper -----Original Message----- From: Oscar van Vlijmen [mailto:ovv@hetnet.nl] Sent: Domingo, 08 de Octubre de 2006 12:35 To: tz@lecserver.nci.nih.gov Subject: Re: Chile DST history
From: Jesper Norgaard Welen Subject: Chile DST history
I took the time to check out in detail what the differences are from this source compared to tz database, based on the page http://www.horaoficial.cl/horaof.htm which contains timezone and time history in Chile since 1884. Here are the results if you apply those to the tz database (I might have made mistakes, since there are plenty of differences):
....
Note (1) Since the starting and ending of DST in 1927-1932 is a bit confusing (not covered by a decree of when it ended), I used the tz database as it was, since the first two transitions concur with the web page. It seems that the Chile web page claims that it stopped in 1928, but it doesn't mention a decree about that.
A table resolving these issues is at: http://www.horaoficial.cl/cambio.htm