Lord, I've seen that before @jfr, I'm halfway through it again and it's like a horror story. I think Dominic sumarised it well when he said "the problem with timezones is that they are political". That pretty much accounts for why it's so friggen hard to reason about.

ooo, Tom Scott did an internationalis(z)ation one too : https://www.youtube.com/watch?v=0j74jcxSunY