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Re: How to tell (in advance) if a date-time is ambiguous?

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July 11, 2017 14:33
Re: How to tell (in advance) if a date-time is ambiguous?
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On 11.07.2017 15:39, Zefram wrote:
> 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

Wow, that's quite a cool bit of information. Thank you, very
interesting! Did you memorize the tzfile of 1969 :-)



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