# Key Semester Dates

**Source**: https://www.uni-bonn.de/en/studying/during-your-studies/key-semester-dates
**Parent**: https://www.uni-bonn.de/en/studying/consultation-and-service/student-registry/re-registration

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

**[Unifest](https://www.uni-bonn.de/en/university/university-life/events/unifest)1**

July 11, 2026

### **Winter semester 2026/27**

**Lecture period**\

October 12, 2026 - February 05, 2027

**[First-Semester-Student's Welcome](https://www.uni-bonn.de/en/university/university-life/events/first-semester-students-welcome/first-semester-students-welcome-2025)2**

October ??, 2026

**[Opening of the academic year](https://www.uni-bonn.de/en/university/university-life/events/opening-of-the-academic-year/eroeffnung-des-akademischen-jahres)3**

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](https://www.mkw.nrw/service/vorlesungszeiten "https://www.mkw.nrw/service/vorlesungszeiten")4**.

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](https://www.uni-bonn.de/en/studying/application-admission-and-enrollment/application-deadlines "Application deadlines")5 section.

## Links

1. https://www.uni-bonn.de/en/university/university-life/events/unifest
2. https://www.uni-bonn.de/en/university/university-life/events/first-semester-students-welcome/first-semester-students-welcome-2025
3. https://www.uni-bonn.de/en/university/university-life/events/opening-of-the-academic-year/eroeffnung-des-akademischen-jahres
4. https://www.mkw.nrw/service/vorlesungszeiten
5. https://www.uni-bonn.de/en/studying/application-admission-and-enrollment/application-deadlines