First boot - creative ideas to set time

Hi again, when one of my projects are deployed in real-life, a battery is mounted and the RTC has power. But what is the most elegant/cheap way to set the clock, when there is no network connectivity. There is a character display, and I can rig up a few buttons if needed - but it just feels a little old-school vcr programming like…

Creative ideas?

dcf was in my thinking, and I found

I have ordered one of these little DCF receivers to play with, just in case.

Atomic time adjusted - it should read on the label on the box… :slight_smile:

Other ideas?