

Tell time by the U.S. Atomic Clock that governs ship movements, radio stations, space flights and warplanes!
Other watches and clocks may tick, but these radio-controlled instruments listen to the signals of the world's most accurate timekeeper, the U.S. Atomic Clock in Boulder, Colorado. It's the most exciting development in the history of timekeeping. These timepieces are self-adjusting even for daylight savings time, and never need setting!
For the exact time anywhere in the U.S. go to www.time.gov, the official U.S. Government website.
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