Actually I have this nifty little desk top app that shows me where it is night and where it is day across the world, so I know which good little boys and girls are in bed, and which bad ones are still up at 4 am here! You know who you are !!
www.hourworld.com
Which version of Windows is OS?
Oh, sorry Mike, didn't I mention? It's a Mac-only app. Tsk, I'm sure there's a PC version just floating around out there somewhere ;-)
I once used xearth for a similar purpose. It makes the desktop a world map that changes with the clock, so that the part of the world where it's night becomes dark accordingly. It also shows recent earthquakes if you want it to.
http://www.hewgill.com/xearth/
anders ------------------------- http://anders.hultman.nu/

