You are here: Home USNO Precise Time Display Clocks
The USNO websites,,,,, and are undergoing modernization efforts. The expected completion of the work and return of service is estimated as 30 April 2020. Please submit a requirements form to the USNOPAO if the information you are seeking is not accessible via other means.

Web-Based Time Synchronization

Web time displays from the USNO Master Clock, Washington, DC

USNO servers provide a wide variety of web-based time synchronization products including embedded web clocks to display UTC(USNO) on other web pages.


USNO Master Clock Time
Javascript must be Enabled