I came across this interesting NY Times article from 1922: 5-day, 40-hour work for Ford employees.
There was a time when the norm was to work for 6 days per week, 8 hours per day. However, the Ford Motor Company set a precedent for a 5-day working week, and others followed.
It got me thinking about whether a “giant” of today may make the same move for a 4-day working week.
I don’t think so, but I know anecdotally from people that work 4-days per week or compressed hours (40 hours in 4 days), that fewer days focuses them, and that more time with family over the weekend is cherished.