Starting from September, it is divided into autumn semester, winter semester and spring semester. Each semester has 12 weeks. The first ten weeks are classes, and the last two weeks are exams. If you have fewer exams, of course, these two weeks are almost equal to a holiday. As the upstairs said, there are many exams and holidays, so you can't learn anything. Among them, the winter semester will be separated by the Spring Festival. Going back to school after the winter vacation, the exam will be held in two weeks. You forgot everything before, and many people failed the exam.