Synchronize your computer's clock to any one of several atomic clocks in the world with Dimension 4. It's the best time synchronization utility available today for Windows 95 and Windows NT 4.0. Click to GET IT FREE !
A new government site which is a team effort between the US Naval Observatory and NIST. Pick your US time zone and get the official time accurate to 0.6 seconds. Also provides a map which shows you who is presently experiencing daylight.