Does anyone here live somewhere with a large difference? In particular Chile and Argentina look like solar noon is a couple of hours after clock noon. Sounds like the kind of place for late sleepers.
In Chile:
On weekends, the time to go out for a drink (Chilean people call it "salir de carrete") starts no earlier than midnight, though somewhat earlier during the week. The pubs and clubs close at 5 AM on weekends, and 4 AM on weekdays.
(c)ourtesy wikitravel
I wonder if it has an impact on the mood of the inhabitants.
It's pretty clear that Paris is less of a morning-city than London.
Drawing any conclusions beyond that is frought with the peril of confounding factors…
Spain used to be in the same timezone as the UK. It made sense, as the Greenwich Meridian crosses the east of the Iberian Peninsula. But in 1942, the fascist dictator Franco decided to use the same timezone as the Nazi Germany and adopted the continental timezone (GMT+1).
The fun part of the story is that, as the Sun didn't actually move, the people kept doing their life at the same moments as before. That's why nowadays in Spain is usual to have lunch at 14 and dinner at 22. Specially in the West.
Hah, and people here are all for having timezones. "Imagine how crazy it would be to have the sun coming up at 3AM in some places and 7PM in others!" I can't be sure without trying, but I'd argue it's pretty much equally messed up with and without timezones. Right now as a computer guy, I know time zones make everything more complicated.
When traveling somewhere for business you make an appointment anyway, so you know when you have to be somewhere and can plan accordingly. For holidays you'd look up the local sunrise time (which varies pretty much everywhere on earth anyway, albeit a bit more predictably now).