Countdown timer, please help!

Ok, heres my situation, im trying to make a countdown timer until a certain date (feb, 6, 06). how do i go about doing it? I want it to be have Days:Hours:Minutes:seconds and it needs to be constantly going. I could easily make one that would work perfectly if it started running tonight and i never turned off my computer or exited the program, i feel the problem is trying to sync the current time with the number of hours remaining. Thanks!

EDIT: I have Flash 5 btw