[stormbrew]

The entire concept of time is a "social agreement". Including when noon is. Solar noon is never at clock noon where I live or for that matter in most places, it's off by an amount dictated by political decisions and boundaries as well as by the fact that it literally drifts a bit over the course of the year.

[mdp2021]

In a way, but it is not "anarchic performance art": it tends to adhere to the actual objective time - it makes sense to create a system that applies reasonable compromises, but attached with a rubber band to the real thing. Approximate flexibly but do not lose the anchor.

People in Paris know they have a pretty severe offset, ~50m (those in Vigo even ~95m). If you added a sticky +1h, the offset against solar time would increase to ~110m and ~155m.