Zone Antarctica/Palmer is currently defined as - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Antarctica/Palmer 0 - zzz 1965 -4:00 ArgAQ AR%sT 1969 Oct 5 -3:00 ArgAQ AR%sT 1982 May -4:00 ChileAQ CL%sT The comment mentions that Palmer station keeps the same time as Punta Arenas, Chile. # 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. The rule ChileAQ in antarctica was copied from southamerica file and the current effective rules are below - Rule ChileAQ 1999 max - Oct Sun>=9 4:00u 1:00 S Rule ChileAQ 2000 max - Mar Sun>=9 3:00u 0 - However, Rule Chile in southamerica was updated in 2008a, 2010d, 2011c and 2011e. The rules for Chile after 1999 are defined as below in the current version. Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S Rule Chile 2012 max - Oct Sun>=9 4:00u 1:00 S Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - # N.B.: the end of March 29 in Chile is March 30 in Universal time, # which is used below in specifying the transition. Rule Chile 2008 only - Mar 30 3:00u 0 - 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 2012 max - Mar Sun>=9 3:00u 0 - If the comment for Antarctica/Palmer is still true, then I think ChileAQ in antarctica should be also updated. Does anyone know if ChileAQ in antarctica was intentionally unchanged or, it's just an error? Thanks, Yoshito