Russia removed Saturday and Sunday…

Russia removed Saturday and Sunday from the calendar for 11 years to create a “continuous working week” from 1929 to 1940.
So instead of everyone having Saturday off, some people had Mondays off, others had Tuesdays off, others Wednesday, etc.
So your “Weekend” came at different points of the week so the factories didn’t stop. In theory, from a purely output perspective, it’s brilliant. But then you have to remember the radical notion that people are humans and these humans have lives and loved ones, so if you didn’t get the rest day on the same day as your partner you might not ever really get to spend time with them.