Dave Rolsky wrote: >If you're trying to avoid these, the best advice I could give would be to >avoid the 12am-4am window, which AFAIK is when most (all?) transitions have >occurred historically.
Most, but there are both historical and current exceptions. America/Godthab (west Greenland) changes 22:00->23:00 and 23:00->22:00 (base offset -03:00, with transition at 01:00 UT per EU rules). America/Santiago (Chile) changes 00:00->23:00. Pacific/Easter (Easter Island) changes 22:00->23:00 and 22:00->21:00 (changing at the same time as Chile, but with base offset 2 hours to the west). Historically, Africa/Casablanca (Morocco) changed 12:00->13:00 in a DST change in 1967. And Pacific/Kwajalein (part of the Marshall Islands) jumped across the international date line in the unfashionable direction, repeating 23 hours of 1969-09-30. -zefram
