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...
Braun makes similar ones.
It'd be cool if there was a drop-in replacement for the standard cheapo clock module that allowed you to add this for existing clocks.
Edit: It exists! https://www.walmart.com/ip/Atomic-Radio-Controlled-Clock-Mov...
Might be doing some retrofitting soon!