So much politics going on in this map.
The eternal UK 🤝 Portugal alliance and the awkward space it creates between them.
Spain and Poland are in the same timezones.
The weird corridor created by Belarus.
Ukraine is in a separate tz from Russia, I wonder when that was established
What the hell is going on with the light blue in the east?
Unfortunately even UTC isn’t perfect once time dilation becomes a factor (eg. Satellites)
It still works. You need to know your correction, but it’s just like a computer with a slow clock. UTC doesn’t explicitly state it, but it’s reference is to a non inertial frame, on the earth’s surface. (Rotational effects are far smaller than current clock errors, and transmission time errors)