I always thought only the Germans are crazy to start work (and school) extremely early in the day. Turns out it's the same in the US but I've only lived in two of the top 5 cities on that list (Ithaca, NY and SF Bay Area)...
That being said, I live in Germany but work UK hours, which means I start at 9:30-10am and finish after 6:30pm local time. I have a vitamin D deficiency. Go figure!