NIST also operates WWV which broadcasts the time. https://en.wikipedia.org/wiki/WWV_(radio_station) https://en.wikipedia.org/wiki/WWV_(radio_station) https://

NIST also operates WWV which broadcasts the time. https://en.wikipedia.org/wiki/WWV_(radio_station) https://en.wikipedia.org/wiki/WWV_(radio_station) https://www.nist.gov/pml/time-and-frequency-division/radio-stations/wwv https://www.nist.gov/pml/time-and-frequency-division/radio-s... When I was a kid my dad had built a Heathkit multiband radio receiver[1] and we used that station to set our clocks at home. 1. https://commons.wikimedia.org/wiki/File:Vintage_Heathkit_16-Transistor_Multi-Band_Radio,_model_GR-43_(8340957439).jpg https://commons.wikimedia.org/wiki/File:Vintage_Heathkit_16-...