I personally think the issue is that we have defined Saturday and Sunday as the weekend. I worked retail, and I loved having Saturday as my "Friday", and Sunday

I personally think the issue is that we have defined Saturday and Sunday as the weekend. I worked retail, and I loved having Saturday as my "Friday", and Sunday and Monday as my weekend, because services had normal hours on Monday, and I could relax on Sunday. The downside at the time was that my schedule often didn't overlap with that of my friends, such as those who worked as servers in restaurants. I find three day weekends to be much more relaxing than the standard weekend. It means I can spend time with my friends on one day, do chores on another day, and spend the remaining day relaxing. As long as I still have a day I can spend with my friends, I'd be okay with a different schedule than M-F or M-R. There is a barrier to a shorter workweek I don't see touched on often, and maybe it's just me. I'm hesitant to work less because I'm afraid that people would find out that I'm just not that necessary around the office, and that the work I do isn't important as I think it is. Realistically, I think such a realization would be more damaging to my personal pride than anything else. I think I base too much of my self-worth on how replaceable I am to my organization. It's a bit ridiculous to seek validation from an organization, but it is one reason why I'd be hesitant to have a day off while other people are working.