[throwawaylinux]

Some clocks use the mains frequency as the input reference. They aren't talking about the time of day being synchronized, just time intervals. I wonder how common that is among modern appliances.

[sethammons]

Interesting, I had never heard of this. Thanks. I found this and got some clarity.

https://hackaday.com/2018/03/29/ask-hackaday-is-your-clock-t...