I think your example is pretty good. The important detail is that the timetable for Bulgaria, would be fairly similar to your own, except it has some kind of offset, which would be more or less exactly what the time zones express. So, instead of everyone that want to relate to some other places’ relative time schedule, having to do it themselves, we just use… Time zones. that’s what time zones are.

Without it, you’d have the same complexities inherent with time zones, but with none of the benefits.

A case of a problem being solved, and mistaking inherent challenges, i.e. the sun moving with a different offset around the world, as a fault of the existing approach. The suggested alternatives would improve nothing, and instead make the problem worse.

I mean, I would imagine that you just have to know when dawn or sunset is in the new location. So in your example? It’s 11:23 am GTM and that in your location, that’s 2.5 hours past noon so you should be finishing lunch.

We have anchored ourselves to certain times having meaning but they are just a stand-in for the true source of truth of local schedule: the sun.

Imo with one universal time, people would just accept that sunsets at X in the summer and rises at Y, everything else would just follow a similar logic.