-
I know. :)
My first thought for that kind of functionality with an analogue display was Seiko Astron, but the ones with the full day/date/etc are over 42mm. There are some tasteful 39mm time & date ones though, eg:
https://www.seikoboutique.co.uk/product/astron-gps-solar-ssj007j1/
GPS sync, solar, you basically never need to touch it. I suspect it might not be what your dad’s looking for though!
Hehehe (that was for you)