NIST runs three radio stations, WWV, WWVH, and WWVB
You've probably not heard of them, but you could well have used them before
They broadcast a time signal to the vast majority of North America, this time signal allows clocks, watches, and all kinds of other things to synchronise with an accurate time
Due to budget cuts they're planning to shut these down in 2019, meaning anything that uses the system won't be getting an accurate time any more and will need to be set manually
Which sucks
@troubleMoney Everyone uses ntp now-a-days no?
@gemlog anything that says "Radio controlled atomic time" or any similar phrase on it uses that system, there's an awful lot of them about
@troubleMoney I found this (admittedly a kluge) solution, but there are probably better implementations of the idea
http://www.jrcomputing.com.au/Set_Watch/Set_Watch_Auto.html
@troubleMoney You have a wristwatch with that band of radio, and a wallclock?
I've never even seen one on offer or found one in someone's house. I'm not doubting there are some, but they certainly aren't popular here.
Mind, my watch uses bluetooth to sync the time, so I'm not one to preach about low-tech either! ;-)
Doubt no more about tcp stacks in wall clocks -- I found lots of them actually. Here's just one link https://sapling-inc.com/products/analog-clocks/