Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Setting Your Computer Clock


The prolific NIST Internet Time Service (ITS) synchronizes more clocks than any time service in the world, handling about one million timing requests every second, or about 80 billion requests per day. The service can be used to set computer clocks and other devices with several different time protocols, but the Network Time Protocol (NTP) is the most prevalent. The Automated Computer Time Service (ACTS) is used to synchronize computer clocks and other devices through analog phone lines.



Created April 27, 2023