6/4 sounds great. I think 3/2/3/2 is also an option, or if there’s one more work day, maybe 3/1/4/2. If only five days of work, we could try the most radical 1/1/1/1/1/1/1/1/1/1 (work every other day). 5/5 is actually pretty reasonable and maybe my favorite. It’s actually pretty workable for employers too because if you need someone working every day, it’s simple to just hire two people. Makes it easier for everybody, and doesn’t it sound great to have three 5 day breaks every month?

I think the biggest advantage to a 10 day week is really just that it accommodates more variation in schedule, and not every person or every industry has to have the same work week. It certainly helps being an even number, so scheduling anything for every other day is easier.

I’m actually so down for calendar reform but it seems like it’s probably an impossible task.