The Monday through Sunday workweek normally lasts eight working days, and the Monday through Saturday playweek normally lasts 4 working days. When you include in the possibility of public holidays, that overall quantity increases to ten working days, and twelve-playing days.
The days themselves are just one element of the calendar, and there are plenty of others. The months of the calendar represent various seasons, and the time between each of those months gives us the seasonal cycle. At the start of spring, the temperature level is high and the days are warm, while at the end of winter the air is cold and the days are cold. Every season has its own special time connected with it, and the calendar assists us monitor all of those shifts. Any seasonal change is reflected in the calendar, and it informs us when and where to go throughout specific times of the year.
Image source: blankcalendarpages.com