How does a clock that has been disconnected from power for any length of time know what time it is when it is reconnected to electricity?

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Just your average alarm clock with no connection to the outside world; just it by its lonesome. i recently had a power outage for an hour and the clock powered back on and had the time exactly right…and had me very confused. Thanks everyone!

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Anonymous 0 Comments

NIST broadcast the atomic time every minute including the date and dst info if in effect. Your clock may have the ability to auto set its time to this signal.

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