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 2024/25
Lecture period
- October 7, 2024 - January 31, 2025
First-Semester-Student's Welcome
- September 30, 2024
- October 18, 2024
Dies Academicus
- December 4, 2024
Lecture-free period (Christmas break)
- December 24, 2024 - January 6, 2025
Re-registration deadlines
Winter semester
August, 31
Summer semester
February, 28/29
Lecture periods until 2026
Summer semester 2025
April 7, – July 18, 2025
Winter semester 2025/26
October 13, 2025 – February 06, 2026
Summer semester 2026
April 13, – July 24, 2026
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.
Eröffnung des Akademischen Jahres 2024/25 | Uni Bonn
Bild © Universität Bonn / YouTube
All application, admission and enrollment deadlines can be found in the Application Deadlines section.