Of course, I hope people aren't implementing time zone utils on their own unless absolutely necessary. Though, there are devs that work on those system tools.

Of course, I hope people aren't implementing time zone utils on their own unless absolutely necessary. Though, there are devs that work on those system tools. There are also cases where times need to sync and the changing can cause some issues. Stored times should be UTC but where they aren't it can makes some systems use local time incorrectly for a bit on the rollback. I have also seen network libs in games not use ticks for session starts that would be problematic on rollbacks playing at switchover. There have also been flaws in system time utils previously. Lots of unnecessary potential edge cases, all for an unnecessary time change of time itself except a few places like Arizona.