I have a miniature version of that clock in my status bar. I love it. Thinking about it: Building a real Arduino-based 24h clock, that I can put on my desk, might be yet another fun project. 🤔 (I probably had that idea many times already and never got to actually doing it.)
Oh so that’s what the geo-info is use for - sunrise and sunset.
It reminds be about https://poleclock.com/ that is very useful for online meetings across timezone - like when we were having our yarn social calls back in the days