When I was a kid, my dad would always set our clocks by tuning the radio to one of the atomic clock broadcasts from Fort Collins. This might be the same source as your automatically synchronized clocks, but the advantage is that it's human-listenable, and not going through any computer networks or algorithms between Colorado and you.
"The advantage is that it's human-listenable, and not going through any computer networks or algorithms between Colorado and you." That is an advantage?
The Fort Collins signal is awful in the northeast. If you want to deal with the disadvantages of not using advanced computer algorithms to govern your clock i would recommend the USNO's phone service:
Same here. My Dad is a life-long ham radio operator and if I hear a WWV broadcast now, it takes me back to my childhood in a flash.
On a related note, I always liked the British time announcements that used three tones, with the designated time being "at the third stroke". It's like a music conductor conducting a measure before you start playing or singing. I wonder if it's measurably more accurate than just playing a tone with the proper time is reached.
https://en.wikipedia.org/wiki/Radio_clock#List_of_radio_time...