For all students except PhD students, who can begin their programmes at any point during the year, and Erasmus students who can begin their programmes in either September or January/February, the academic year starts in mid-September and finishes and the end of June (thus a student can only start in September).
Classes are spread over two terms: the first term starts in mid-September and finishes at the end of December, and is followed by an examination session spanning the first three weeks of January. The second term starts at the end of January and ends in mid-May. This is followed by an examination session throughout June.
A third session is held in the second half of August and the first week of September so that students can resit exams they did not pass the first time.
Check the academic calendar.