For anybody running Win9.x (maybe ME, no guarantees)- sorry Anna, you could go here:
http://www.driveway.com/share?sid=9f78513f.96073&name=useful+stuff and download a freeware app. called clockrack.exe It sits at the top of your screen, hidden until clicked on, and will display the time in up to ten different timezones at once. I currently have mine set to LA, London, NY, Tokyo, Auckland, and Melbourne. It takes all the guess work out of determining who's up past their bedtime!