NIST Time Widget

This widget is a public service provided by the Time and Frequency Division of the National Institute of Standards and Technology (NIST).  It is a web clock showing the official time of day from NIST, displayed as a 12 or 24-hour clock, in a user-selectable time zone.

The time reference for the widget is the output of the national time scale called UTC(NIST), which disseminates Coordinated Universal Time UTC(NIST).
The widget adjusts the display to show the local time based on the client's computer time zone settings as the default.
The widget is not continuously linked to NIST, it re-synchronizes with NIST every 10 minutes. So the running clock comes from the internal oscillator of the local computer. Therefore, this widget is intended as a time-of-day service only.  It should not be used to make measurements, nor should it be used to establish traceability to NIST.

The widget utilizes the client's computer clock as a timer to measure the round-trip network delay, which is the interval of time starting when the widget sends a time request to the server and ending when the time is displayed in the browser. The time shown estimates that one-half of the round-trip delay is the delay from the time server to the browser.

The widget can not longer be embedded into other web pages.

This is a web page with just the widget:
We do not have a widget/gadget application for your desktop.

Send any comments or questions to:

Please refer to our for our web clock/map and our Time and Frequency Division FAQ with questions about time zones, daylight saving time, atomic clocks, etc.