How To Show Two Time Zones In Google Calendar
For those of you travelling and or working with clients and the team in different time zones this may be a big help:
Can I show more than one time zone on my calendar?
Yes, you can view two time zones in Google Calendar. To add another time zone to your calendar view, click Settings. On the General tab, under Your current time zone, select another time zone in the Additional time zone list.
Also worth a look is http://www.worldtimebuddy.com