I originally posted this feature suggestion because I needed to put a tradeshow event in the calendar. The tradeshow took place in another time zone, and when I got there I realized that the calendar entry was on the wrong day. I also frequently schedule conference calls with clients and suppliers in other time zones.

Actually it's kind of the same issue with Calendar. When creating an event it would really be nice to be able to specify the time zone of the event, when the time zone of the event differs from the time zone of the browser.