| Tuesday, Aug. 26 | Class of 2018 arrival day |
| Tuesday, Aug. 26 – Tuesday, Sept. 2 | First-year orientation |
| Monday, Sept. 1 | Residence halls open; upper classes return |
| Wednesday, Sept. 3 | First classes |
| Monday and Tuesday, Oct. 13 and 14 | Fall recess (no classes) |
| Friday, Oct. 17 – Sunday, Oct. 19 | Family Homecoming Weekend |
| Wednesday, Nov. 26 – Sunday, Nov. 30 | Thanksgiving recess |
| Friday, Dec. 5 | Last classes of first semester |
| Saturday, Dec. 6 | Last day for scheduled events |
| Wednesday, Dec. 10 – Monday, Dec. 15 | Semester examinations |
| Tuesday, Dec. 16 | Residence halls close for winter recess |
| January Term | |
| Monday, Jan. 5 – Thursday, Jan. 29 | January Program |
| Second Semester |
| Wednesday, Feb. 4 | First classes |
| Saturday, March 21 – Sunday, March 29 | Spring recess (residence halls closed) |
| Thursday, April 30 | Colby Liberal Arts Symposium |
| Friday, May 8 | Last classes of second semester |
| Saturday, May 9 | Last day for scheduled events |
| Wednesday, May 13 – Monday, May 18 | Semester examinations |
| Saturday, May 23 | Baccalaureate |
| Sunday, May 24 | Commencement |
| Summer 2015 |
| Thursday, June 4 – Sunday, June 7 | Reunion Weekend |