Key Semester Dates
As is common at many universities, the academic year at the University of Bonn is divided into two half-year semesters. The winter semester actually begins in autumn, while the summer semester begins in the spring. The formal semester start dates are not the same as the lecture periods, which change from year to year.
Academic Calendar
Semester start
Winter semester
October 1 – March 31
Summer semester
April 1 – September 30
Lecture Periods and Deadlines
Summer semester 2025
Lecture period
April 7 - July 18, 2025
Dies Academicus
May 14, 2025
Lecture-free period (Pentecost break)
June 09 - June 13, 2025
July 5, 2025
Winter semester 2025/26
Lecture period
October 13, 2025 - February 06, 2026
First-Semester-Student's Welcome
October 08, 2025
October 20, 2025
Dies Academicus
December 03, 2025
Lecture-free period (Christmas break)
December 24, 2025 - January 6, 2026
Re-registration deadlines
Winter semester
August, 31
Summer semester
February, 28/29
Lecture periods until 2026
Winter semester 2025/26
October 13, 2025 – February 06, 2026
Summer semester 2026
April 13, – July 24, 2026
Winter semester 2026/27
October 12, 2026 – February 05, 2027
Lecture periods for the following years can be found on the
website of the Ministry of Culture and Science of the State of North Rhine-Westphalia.
Willkommen an der Uni Bonn. Welcome at the University of Bonn.
Bild © Universität Bonn / YouTube
All application, admission and enrollment deadlines can be found in the Application Deadlines section.