Most of today’s atomic clocks adjust to the precise second via radio signal from the U.S. Atomic Clock in Boulder, CO. These radio-controlled timepieces even change automatically to Daylight Saving Time.
But really. Who cares about split-second time? Far sweeter it would be to hear the noon whistle at the fire station; or a striking clock; or to tell time with a trusty “dollar watch.”
Our advice is worthless but free: If you have a clock that needs setting, run it up an hour before you go to bed Saturday night. You’re going to lose an hour’s sleep no matter what, so why add to the lost time by getting up in the middle of the night?