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Welcome

The Time and Frequency Division, part of the NIST Physics Laboratory, maintains the standard for frequency and time interval for the United States, provides official time to the United States, and carries out a broad program of research and service activities in time and frequency metrology.

*Note:
      We switch to daylight saving time on Sunday, March 14th.
      Please see our DST page for details.



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NIST Demonstrates Miniature Atomic Clock

NIST researchers have demonstrated a minuscule atomic clock with inner workings about the size of a grain of rice and potential applications in atomically precise timekeeping in portable, battery-powered devices for secure wireless communications, more precise navigation, and other applications.

 For more information, please see the Atomic Devices and Instrumentation Group.

News and Events
NIST, CU to Build Instrument to Help Search for Earth-like Planets

The National Institute of Standards and Technology (NIST) will collaborate with the University of Colorado at Boulder (CU) to build and apply a custom laser-based instrument--a frequency comb--to …

NIST Physicist David Wineland to Share 2010 Benjamin Franklin Medal in Physics

David J. Wineland, a physicist at the National Institute of Standards and Technology (NIST), will share the 2010 Benjamin Franklin Medal in Physics for "experimental realization of the first …

NIST Updates Popular Guide to Radio-Controlled Clocks

The National Institute of Standards and Technology (NIST) has updated its popular guide to radio-controlled clocks. Many millions of radio-controlled clocks, watches, and other timepieces are …

Contact

General Information:
303-497-3295 Telephone
303-497-6461 Fax

NIST Time and Frequency Division
325 Broadway, M/S 847
Boulder, CO 80305-3328