http://tycho.usno.navy.mil/time.html
The Directorate of Time Web page is run by the US Naval Observatory and provides information about precision timekeeping. Users will find out about the Observatory and its services, learn about how it creates time scales for the United States and the world, and be able to read about the various clocks that the Observatory uses to keep time. One can sign up to receive the correct time via modem or automated data servers, and by clicking the 'what time is it?' button, one can also get the exact official time for one's time zone.