In the country I grew up (Turkey) 6 day work week was pretty much the norm, my dad worked 6 days a week. Fast forward 15 years, now I work in the US, and appare

In the country I grew up (Turkey) 6 day work week was pretty much the norm, my dad worked 6 days a week. Fast forward 15 years, now I work in the US, and apparently in Turkey 5 day work day is more common (and normal) than 6. Considering that Turkey is the most conservative country in Europe, this is one datapoint that this sort of things can change. I'd expect in the next 500 years, things might change in US too, unless you have some other argument supporting otherwise.