The following new feature is now available in Google Calendar for all Google Apps domains:
Event timezones – You can now specify the time zone for a given event. You can even set up events which start in one time zone and end in another.
Previously this feature was only available to domains with ‘pre-release features’ enabled in the Administrator Control Panel.
How to access what’s new:
Event timezones: Click the “Time zone” link to the right of the date and time fields on the event page. Events will appear on your calendar according to the current time zone you’re in, and when you change to your destination time zone they’ll be in the right place.
For more information: