| October 1 | Immunization record deadline |
| October 1 | Suit-Up Mason |
| October 1 | Free Application for Federal Student Aid (FAFSA) available |
| October 4-5 | Fall Job and Internship Fair |
| October 7 | Saturday classes in session |
| October 9 | Columbus Day recess (Monday classes/labs meet Tuesday; Tuesday classes do not meet) |
| October 12 | Flu shots begin |
| October 12-15 | Alumni Weekend |
| October 13 | Midterm evaluations end |
| October 13 | Mason Madness |
| October 25 | Family of the Year nominations close |
| October 29 | Family Weekend registration closes |
| October 31 | Halloween |