Here's a proposed patch to reflect an error in the current tz data that was reported by Fabian L. Arce Jofre on April 4. Last summer, Argentina observed daylight saving time, but it didn't adjust its clocks because it changed the standard-time UTC offset during the period while it was observing DST. (Isn't politics wonderful?) The current tz data has the correct Argentine wall clock values, but has incorrect values for the the tm_isdst flag and for the time zone name for the period 1999-10-03 to 2000-03-05. =================================================================== RCS file: RCS/southamerica,v retrieving revision 2000.3 retrieving revision 2000.3.0.1 diff -pu -r2000.3 -r2000.3.0.1 --- southamerica 2000/03/04 15:31:08 2000.3 +++ southamerica 2000/04/19 05:36:52 2000.3.0.1 @@ -111,24 +111,31 @@ Rule Arg 1989 1992 - Oct Sun>=15 0:00 1: # From Rives McDow (2000-01-10): # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, # which did not result in the switch of a time zone, as they stayed 9 hours -# from the International Date Line. On March 5, 2000, at 0:00 local time, -# Argentina will come off daylight savings time, which will bring them to 8 -# hours from the International Date Line. +# from the International Date Line. +Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S +Rule Arg 2000 only - Mar Sun>=1 0:00 0 - # # From Peter Gradelski via Steffen Thorsen (2000-03-01): # We just checked with our San Paulo office and they say the government of # Argentina decided not to become one of the countries that go on or off DST. # So Buenos Aires should be -3 hours from GMT at all times. # +# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04): +# The law that claimed DST for Argentina was derogated by President Fernando +# de la Rua on March 2, 2000, because it would make people spend more energy +# in the winter time, rather than less. The change took effect on March 3. +# # Zone NAME GMTOFF RULES FORMAT [UNTIL] # -# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), -# Tierra del Fuego (TF) & Antartida e Islas +# Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC), +# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov -4:16:44 - CMT 1920 May # Cordoba Mean Time -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 - -3:00 Arg AR%sT + -3:00 Arg AR%sT 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 + -3:00 - ART # # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), # Formosa (FM), La Pampa (LP), Chubut (CH) @@ -137,6 +144,8 @@ Zone America/Rosario -4:02:40 - LMT 1894 -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 -3:00 Arg AR%sT 1991 Jul + -3:00 - ART 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 -3:00 - ART # # Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), @@ -146,6 +155,8 @@ Zone America/Cordoba -4:16:44 - LMT 1894 -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 -3:00 Arg AR%sT 1990 Jul + -3:00 - ART 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 -3:00 - ART # # Jujuy (JY) @@ -157,6 +168,8 @@ Zone America/Jujuy -4:21:12 - LMT 1894 N -4:00 - WART 1991 Oct 6 -4:00 1:00 WARST 1992 Mar 15 -4:00 - WART 1992 Oct 18 + -3:00 - ART 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 -3:00 - ART # # Catamarca (CT) @@ -167,6 +180,8 @@ Zone America/Catamarca -4:23:08 - LMT 18 -3:00 Arg AR%sT 1990 Jul -3:00 - ART 1991 Jul -3:00 Arg AR%sT 1992 Jul + -3:00 - ART 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 -3:00 - ART # # Mendoza (MZ) @@ -178,6 +193,8 @@ Zone America/Mendoza -4:35:16 - LMT 1894 -4:00 - WART 1991 Oct 15 -4:00 1:00 WARST 1992 Mar 1 -4:00 - WART 1992 Oct 18 + -3:00 - ART 1999 Oct 3 0:00 + -4:00 Arg AR%sT 2000 Mar 3 0:00 -3:00 - ART # Aruba