What Companies Offer Accurate Online Clocks?


Quick Answer

The U.S. Naval Observatory and the National Institute of Standards and Technology cooperate to determine a standard world time called Coordinated Universal Time, which can be viewed on time.gov. Other websites such as time.is and timeanddate.com keep accurate online clocks synchronized to this time.

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Full Answer

The National Institute of Standards and Technology and the U.S. Naval Observatory compare data measured from atomic clocks to compute a standardized world time; these measurements are accurate to at least 1/10,000,000 of a second. Time.gov displays this time, correcting for the time lag incurred by displaying this information across the Internet. Many other websites offer this information for free; some of the most popular are time.is, timeanddate.com and worldtimeserver.com.

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