About
Source Image
The original Java applet time.gov site has been replaced with HTML5, cross-platform-compatible code requiring no plugins.
This public service is cooperatively provided by the two time agencies of the United States: a Department of Commerce agency, the National Institute of Standards and Technology (NIST), and the U. S. Naval Observatory (USNO). Readings from the clocks of these agencies contribute to world time, called Coordinated Universal Time (UTC). The time maintained by both agencies should never differ by more than 0.000 0001 seconds from UTC (see recent comparisons).
Go to: Time & Frequency Division, NIST Time Service Department, USNO
Issues
This web site is intended as a time-of-day service only. It should not be used to measure frequency or time interval, nor should it be used to establish traceability to NIST or the USNO.

To see the animated clock, only javascript must be enabled. No plugins are necessary.
A few versions of Internet Explorer may not adapt correctly, if so, make sure that Windows Compatibility View is turned off. Otherwise, try the alternate Flash page.

The time shown has been corrected for the path delay of the timestamp through the Internet.

Also, check out the NIST Time Widget

For questions about Daylight Saving Time (DST), a.m./p.m., noon/midnight and UTC, check the NIST FAQ

For sunrise/sunset information check the USNO Astronomical Applications Web Page

Setting Your Computer Clock
  You can download software from NIST and USNO in order to use the Internet to automatically set your computer clock to the correct time.
Time Zones
For a more detailed time zone map, look at our map of US time zones.
For time zone offsets around the world, please consult our world time zone map.
Comments
Please send any comments or questions to: timeinfo@boulder.nist.gov
However, due to the volume of email we receive, we cannot always respond to each one individually.

Disclaimer:   Linking to an external site does not imply recommendation or endorsement of the information or
commercial products by NIST or USNO.

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