In a four-day work society, the extra "weekend" day can be spent with parents. Assuming the 'whole world' agrees to take the same day off. A more likely implem

In a four-day work society, the extra "weekend" day can be spent with parents. Assuming the 'whole world' agrees to take the same day off. A more likely implementation is that you'll keep the traditional 5-day work week, but everybody only work 4 of those 5 days on any given week.