I can't begin to explain how much less stress I encounter in day to day life having just one week day to stay home. Just having a day to be able to easily knock out chores between Jira issues; drop the car off at the dealer, sell something on craigslist, complete a house project, go to the dentist, meet the handyman, go to the bank, etc is so nice. All of these things wind up on the back burner when I'm in the middle…
This seems to conflate working from home with having time off. Is your employer paying you to work on that day or not?
I work four days a week (30 hours). On my days off, I do not work at all. On my days on, I do not do random house chores during office hours. That's what my employer and I agreed to, and I think it describes what most people understand as a four day workweek.