There's a lot of really weird edge cases like that. A lot of the times you sort of have to make a judgement call.
There are cases where you have to make a judgement call, one way or another. Take the case where I invite you to a weekly meeting at 2pm. You live in a place with DST, I don't. DST happens and... is the meeting at 2pm, or 3pm, or what? Google Calendar (and many others) basically say whoever owns the event wins, so our "regular" meeting time would track however you go through life (at least in terms of DST), so times might change for you but not me, and vice versa.
Anyway, yeah, there's some really odd interactions once you start digging deeper.
