The Monday through Sunday workweek typically lasts 8 working days, and the Monday through Saturday playweek usually lasts 4 working days. When you include in the possibility of public holidays, that overall amount increases to 10 working days, and twelve-playing days.
The days themselves are just one element of the calendar, and there are plenty of others. Any seasonal change is shown in the calendar, and it tells us when and where to go during certain times of the year.
Image source: free-printable-calendar.com