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by mc32 5287 days ago
I think there is a difference. In German States, some states stipulate business hours†. In the US (and most other places) it's up to the businesses to decide their business hours.

Regarding the "supposed" part. I don't know exactly but I don't think there was some coordination or agreement between nations on who would do what.

http://en.wikipedia.org/wiki/Shopping_hours#Germany