The academic year in Poland is divided into two semesters of 15 weeks each – the winter and the summer semester. The winter semester starts in October and ends in mid-February, with a break of about ten days for the Christmas holidays. The examination session usually takes two or three weeks, beginning in January. The summer semester starts in mid-February and ends in June, with a one-week break for Easter. Summer holidays last for three months from the beginning of July to the end of September, but only for those students who passed all exams within the summer examination session (two-three weeks in June). Those who failed take the exams again in September.