[dyingkneepad]

The fact that you have to announce timezones is already an error. If I need to schedule a meeting I don't need to select timezones, they're already selected from the timezone I'm part of. There's never room for error by "picking" the wrong thing, since there's nothing to pick. And if my system is programmed with the wrong timezone, then every single meeting will be off-by-N and my calendar will show the wrong time as "now". It would be impossible to miss such an error.

I think your company needs better tools to handle meetings.