The University of Comilla follows the semester system. The duration of one semester is 16 weeks. There are three semesters in a calendar year — Spring Semester (January to April), Summer Semester (May to August), and Fall Semester (September to December). The Summer Semester is an optional semester for a regular student. The University of Comilla will offer courses in Summer Semester if students want to take courses. The details of the three semesters are given below:
| Semester | Activities | Duration* |
Spring Semester (January to April)
| Admission | January 01 to January 27 |
| Orientation | January 27 to 28 | |
| Classes | January 30 to March 03 | |
| First-term Examination | March 03 to March 09 | |
| Classes Mid-term | March 03 to April 03 | |
| Examination | April 03 to April 09 | |
| Classes | April 04 to May 07 | |
| Preparation for Final Examination (no classes) | May 08 to May 12 | |
| Final Examination | May 13 to May 19 | |
| Semester Recess | May 20 to May 29 | |
Summer Semester (May to August)
| Admission | April 30 to May 31 |
| Orientation | June 01 and 02 | |
| Classes | June 03 to July 05 | |
| First-term Examination | June 29 to July 05 | |
| Classes | July 06 to August 06 | |
| Mid-term Examination | July 30 to August 06 | |
| Classes | August 07 to September 08 | |
Preparation for Final Examination (no classes | September 09 to September 15 | |
| Final Examination Semester Recess | September 16 to September 19 | |
| Semester Recess | September 20 to September 26 | |
Fall Semester (September to December) | Admission | September 01 to September 26 |
| Orientation | September 27 and 28 | |
| Classes | September 29 to October 31 | |
| First-term Examination | October 25 to October 31 | |
| Classes | November 01 to November 24 | |
| Holidays | November 25 to November 30 | |
| Classes | December 01 to December 09 | |
| Mid-term Examination Classes) | December 03 to December 09 | |
| Classes | December 10 to January 12 | |
Preparation for Final Examination (no classes | January 13 January 15 | |
| Final Examination | January 16 to January 21 | |
| Semester Recess | January 22 to January 29 | |
| Classes and examinations will not be held on government holidays and make up classes will be arranged separately. | ||