On Thu, 30 May 2019 at 13:04, Robert Elz <kre@munnari.oz.au> wrote:
What are you planning to do when some part of the US (say Illinois, or something else on Central time) decides to set their zone backwards by an hour for a month in the middle of winter
I imagine the code would just move the base offset back for that period. The key point is that both forms can express the same outcome in terms of when the clocks actually change. The practical differences are what the API says is the base offset and what the API says is daylight time. Where this debate goes wrong is emails that assert tzdb's choice to follow the legal definition is the only possible choice. It isn't. The other choice of exposing the smaller/larger offset is perfectly valid too. Just different. Stephen