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 2026
Lecture period
April 14 - July 24, 2026
Dies Academicus
May 20, 2026
Lecture-free period (Pentecost break)
May 25 - May 29, 2026
July 11, 2026
Winter semester 2026/27
Lecture period
October 12, 2026 - February 05, 2027
First-Semester-Student's Welcome
October ??, 2026
October 19, 2026
Dies Academicus
December 02, 2026
Lecture-free period (Christmas break)
December 24, 2026 - January 6, 2027
Re-registration deadlines
Winter semester
August, 31
Summer semester
February, 28/29
Lecture periods until 2028
Summer semester 2027
April 05, 2027 – July 16, 2027
Winter semester 2027/28
October 11, 2027 – February 04, 2028
Summer semester 2028
April 17, 2028 – July 28, 2028
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.