Note of Caution:
Below are the provisional schedules for the academic year 2017-2018, and they are very tentative because of the shortage of the lecture rooms, which still have to be scheduled for the whole university. The exam dates are even more indefinite. The only fixed dates in the schedules are the public holidays, in accordance with the Leiden University Annual Calendar. Everything else in the schedules can be subject to change, and on all the days that are not public holidays, your presence can be required for courses and exams.
The tentative course schedule for the Life and Behavioural Sciences specialization for 2017-2018 can be found here.
The tentative course schedule for the Data Science specialization for 2017-2018 can be found here.