Bill Moseley wrote: > hour => 12, # Assume this exists This does not always exist. Africa/Khartoum on 2000-01-15, for example. In fact, thanks to cases such as Pacific/Apia on 2011-12-30, not only is there no hour that exists on every day in every zone, there are actually some zone days for which no hour exists.
>And for the end time of the month (to the second): Rather than subtract a second and use a <= comparison, it's cleaner to use the start time of the next month and a < comparison. >I was thinking of an implementation that assumed DST change happened at an >hour boundary and simply try incrementing hours until no more exceptions. That's a bad assumption. You can assume *minute* boundaries, but not hours. -zefram
