Support Windows system time zone transitions in all years #15891
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HertzDevil
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platform:windows
straight-shoota
approved these changes
Jun 11, 2025
straight-shoota
approved these changes
Jun 11, 2025
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Adds a new
Time::WindowsLocationclass that handles month + week + day-of-week transitions both before the first fixed transition and after the last fixed transition. This eliminates the need to arbitrarily store 201 years' worth of fixed transitions in any Windows system time zone.The side effect is that there are indeed no fixed transitions now, these will have to wait until #13518.