This is true when using a UTC offset as it has any potential DST already applied, so it can’t adapt to changes like that.
But if you say I have an appointment at 2026-09-07 15:00:00 in the timezone America/New_York I think that also accounts for future rule changes of that timezone.
I’m no expert on this matter but I believe that’s similar to how the new JS temporal API handles such things
But if you say I have an appointment at 2026-09-07 15:00:00 in the timezone America/New_York I think that also accounts for future rule changes of that timezone.
I’m no expert on this matter but I believe that’s similar to how the new JS temporal API handles such things