I've worked a four day work week in a construction related job for years now. I do 4 10 hour days. I figure the company saves money because they cover site travel time when I'm not in the office. Mostly it's sort of difficult for others to understand I'm not available at all any Friday and weekend rates apply then. A 10 hour day isn't too bad but it's definitely the sort of thing where I'm not really doing anything else those days, work eat and sleep.
The weird thing I run into is I try to schedule things like dental cleanings or tax work etc on Fridays (when I'm off) and I run into all the other people that also take Fridays off.
4/10s is better than 5/8s, but I think the 4 day workweek movement is trying to reduce the hours worked to 32 hours as a matter of principle. The idea behind 5/8s was 8 hours work, 8 hours leisure, 8 hours sleep. For that lifestyle to work it assumed a wife at home doing a similar amount of work to keep the household running.
Now most families have both parents working 40 hours a week. Which means they're working for 8 hours, coming home and doing a bunch of chores, then going to sleep. Leisure activities are often done at the expense of sleep.
A 32 hour work week would give people back some of the leisure time they lost.
I think I'm allowed to drop down to 36 hours without any problem. Under that consistently and we run into full time classification issues and maybe insurance gets dropped.
The weird thing I run into is I try to schedule things like dental cleanings or tax work etc on Fridays (when I'm off) and I run into all the other people that also take Fridays off.
4 Day work weeks aren't that uncommon.