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The National Institute of Standards and Technology - Time and Frequency Division 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.
Exact time now, time zone, time difference, sunrise/sunset time and key facts for United States.
United States time now. USA time zones and time zone map with current time in each state.
Official UTC (NIST) Time. connecting. Time Zone Information.
USA Time Clock & Map - check current local time in the USA - timezones, time difference, offset to GMT/UTC, summer/winter time conversion dates, actual official time in the US, United Satets free clocks.
Time.is displays exact, official atomic clock time for any time zone (more than 7 million locations) in 57 languages.
Exact time now, time zone, time difference, sunrise/sunset time and key facts for Eastern Standard Time (EST).
Get the official US time across devices with the NIST HTML5 cross-platform time widget.
NIST, in coordination with the U.S. Naval Observatory, provides official time for the United States. NIST builds and operates the country’s most accurate atomic clocks, which help set the global time scale known as Coordinated Universal Time.
The current time is shown on the Internet at https://www.time.gov/ - it synchronizes with NIST every ten minutes. There is an accuracy statement based on a measurement of the round-trip network delay.