A few years back, when I lived in Madrid, I noticed that this city has an insane grind. To me it looked as if the culture there started off with a "begin work early, have siesta, end work late" setup, but at some point along the way they lost the siesta part.

Many Spaniards work really hard all day, all week, then (at least the young ones) party just as hard all weekend. Repeat ad infinitum.

Don't know about the time zone though. That seems dubious.