Year-round school is the practice of having students attend school without the traditional summer vacation, which is believed to have been made necessary by agricultural practices in the past, the agrarian school calendar consisted of a short winter and a short summer term, so students could help with planting in the spring and harvest in the fall. In cities, schools were open most of the year (In 1842, New York City schools were open 248 days a year, although school attendance was not yet mandatory). (Now, as of 2021, there are usually 180 days per total school year.) summers were very hot before air conditioning was invented, so upper class and eventually middle-class families would flee the cities and take their children to the countryside. Schools in cities eventually start taking summ