An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( LockA locked padlock
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
NIST offers time announcements via phone courtesy of WWV and WWVH.
The U.S. Naval Observatory also provides this service.