[rrrhys]

I have always followed the same, but also found calendar events are a good carve out to this.

The user doesn't care about the timezone change yesterday (and shouldn't..), they just need to see their meeting at 10am.

[deathanatos]

It is a good carve out, but it means you have to be careful.

For example, in my work, we handle appointment data, and we've gotten appointments sent to us from an upstream provider scheduled for non-existent local timestamps. (E.g., 2:30am in the middle of a spring-forward jump. That timestamp doesn't exist. Also in the fallback, where that timestamp is ambiguous.)

Even Google Calendar chokes on certain appointment times.

[rjh29]

It's just not DST though. What if the user moves to a different country? Their 10am US meeting should probably update to the local timezone.