June 1, 2019
7:43 a.m.
Brandon Smith wrote:
we now have a situation in which the transition from DST off to DST on results in an ambiguous local time period for Ireland.
For what it's worth, this particular situation is not new in tzdata. For example, Europe/Kiev has a transition from +03 (without DST) to +02 (with DST) on 1941-09-19 at 24:00, which means that timestamps that day between 23:00 and 24:00 are ambiguous in Kiev. This transition has been present since the release of tzdata 1999j two decades ago. I'm sure there are other examples.