I'm wondering when and by whom the idea of a work-free weekday was invented.
This is actually two parts, and I wonder about both of them and a (superficial, I'll admit) research turned up very little, all of it much too recent to be the true thing.
- First, who had the idea of having a work-free day in the week?
- Second, who had the idea to coordinate everyone's free day to the same day?
We know that the Romans had no weekends (because they didn't have weeks, only months), but the Jews did, at around the same time. Did they come up with it or copied it from someone else?
Did other Middle Eastern cultures have work-free days? Did someone else (Asian, South American, etc.) invent the same thing independently?