I have 4 Seiko wall clocks that are radio wave controlled. They look beautiful and other than changing the battery need 0 intervention from me. Couldn't recommend them highly enough.

Pity they don't seem to make them any more, the newer ones use GPS and don't look quite as nice (in my opinion at least).

https://www.rigbyjewellers.co.uk/products/radio-controlled-r...

I tried atomic clocks but they wouldn't work unless they were on the southwest corner of the house. It even said in the manual that if it's not working, to try putting it there. Kind of defeats the purpose setting itself if I have to move it to a specific corner of my house twice a year.

Though I didn't want a digital clock--my goal was an analog-style clock that never needed any maintenance. And it ends up there are some reasonably priced ones on Amazon that just connect to WiFi once a day and adjust if necessary, including to account for DST. I have it set to run at 4am each day, so any DST adjustment happens while I'm still sleeping.

The only final step is to run hardwired power to it so I don't need to change batteries, but I haven't pulled that trigger yet. Often with projects like this, it's more fun to prove out the difficult parts and I lose interest once only the easy parts remain.

My solution to this is to not have clocks in my house at all.

This has nothing to do with the fact that I still haven't figured out how to set the time on my microwave. :D

I was going to mention an Atomic Clock. I use one in an RV and it sets itself even outside of cell phone range. I know it uses a radio signal of some type but I have no idea how it works. It rights itself within a few minutes of time changes, battery loss, or the like.

I did went GPS+ntp route.

I have a few raspberry pis on my lan that serve NTP time. (you need more than one)

Over the years I've experimented with various flavors.

Right now I have a mix:

1) a pi3 with a gps hat and a battery backup for the pi itself. It uses ntp 127.127.20.20 for gps time, and 127.127.20.28 for PPS. The SMA antenna goes to receiver at the window

2) a pi3 with USB gps on a cable going to the window

3) a pi4 same as above, but with a tiny battery backup rtc attachment

4) a pi5 with usb gps + the new RTC with an added rechargable battery backup

usually, when power goes out, a few reboot, but #1 stays up if <1hr without power. If power outlasts the pi with battery backup, the RTC battery backups take over. strangely #1 doesn't reboot when it has power, some artifact of the battery backup hat - I have to manually reset it.

I've also kind of wondered if GPS might be able to give you a time less accurately but quicker. Sometimes I look at the NMEA GPS output, and it sometimes doesn't have a position fix, but it does give out a time + week number

(this is all for no good reason, just yak shaving.)

Floridian here. WWVB has never worked for me indoors (never tried outdoors). I've tried multiple vendors' clocks in multiple houses (wood frame and concrete). I assume the coverage is fine outdoors or with a sufficiently large antenna, but none of the clocks I've seen even have a mechanism to connect such an antenna. I could hack one, but then it would probably stop being cheap and reliable.

I'd love to buy an off-the-shelf WiFi+NTP clock, but everything I've seen is very expensive, intended for commercial timing applications or synchronizing clocks across a campus.

Australia here, no radio time as far as I know. Lately I've been wondering whether accurate time could be derived from terrestrial digital TV signals.

Yeah stuff like this fits the "old school" definition https://en.wikipedia.org/wiki/Time_signal#Electrical_time_si...