[emacsen]

I vaguely recall there being a project that essentially used the Swatch algorithm, but switched to UTC, and removed the Swatch name for trademark reasons.

I wish I could find it now, since it did exactly what we're discussing.

[slim]

maybe you're thinking of sensor watch ? it's beat watch face seems to be set to whatever timezone you configure which defaults to UTC :

https://github.com/joeycastillo/Sensor-Watch/blob/main/movem...