Comment by anonymars
2 days ago
> just having the wall time stored so that it can be converted to the correct UTC value at "decision time"
Well, this isn't unambiguous in all cases either unfortunately: 1:30 AM in Houston, TX (Central Time) on 3-Nov-2024 could be either 0630Z (Central Daylight Time) or 0730Z (Central Standard Time), since the clocks will have fallen back.
Yes, but it's vastly less ambiguous: ambiguity for one day between 1:00AM - 3:00AM out of the year vs ambiguity for all future dates and times.
Now you can prompt the user for their intent when the time change is known or expected. The ambiguity is now narrowed down to only the situations where the time change could not have been known in advance.