I listened to an interesting podcast about something like this, it might have been on 'cautionary tales '. Apparently at one point some Soviet area tried organising everyone’s days off in shifts instead of everyone taking Sunday off and factories lying idle. Basically tho you actually loose a lot of the social value of days off if you don’t get them at the same time as other people. Can’t visit your family or friends unless they have the same day off as you, for example. And what if your kid’s school’s day off isn’t the same as yours?