milliseconds since January 1, 1970 (12:00 AM)
It is in Britain (GMT) now.

Alright. You see every major clock I created, on this page. Click the button, and tell me what you see. How many milliseconds since 1/1/70? Read the bar. Look at the status for my status bar clock.
By this page (alone) you could see how to use the "getTime();" method.