A great illustration of why we should shun them whenever we can.

Calendar apps are exactly where the full and monstrous complexity of time zones emerges, and I don't envy anyone who works on one.

My case is that the problem doesn't have to happen in the other direction and this unforced error is made frequently. There are a huge class of recurring events where drifting by an hour on the local clock won't make a difference, but either skipping something or doing it twice is bad.

What you're describing strikes me as a bug in the absolute sense: nothing should be displaying PST during a time frame when that time zone isn't in use.

Again, don't sign up to have these problems if you can possibly avoid it.