Academic Calendar
2025-26 Calendar*
with Academic Deadlines & Events
Olin College uses as a semester-based calendar with standard fall and spring sessions. Semesters are 15 weeks in length with the first day being the first day of instruction and the last day being the last day of final exams.
*Academic calendars are subject to change.
| FALL 2025 | ||
| August 26 (Tu) | Class of 2029 Arrival & Start of Orientation, halls open 10am | |
| August 31 (Su) | Returning Student Arrival, starting at noon (first meal is dinner) | |
| September 1 (M) | Labor Day - no classes | |
| September 2 (Tu) | First day of instruction, Fall Semester | |
| September 8 (M) | Last day to add a course for session I offering | |
| September 15 (M) | Last day to add a course for full semester offering | |
| September 15 (M) | Passionate Pursuit Application and Credit Deadline | |
| September 15 (M) | Co-Curricular Registration Deadline | |
| September 15 (M) | Independent Study, Research Registration Deadline | |
| September 17 (W) | Constitution Day, September 17, classes in session | |
| September 27 (Sa) | Office of Admission and Financial Aid, Fall Open House | |
| October 1 (W) | Last day to drop; declare pass/no credit for a session I course | |
| October 1 (W) | Tentative date for Spring Course Fair | |
| October 8 (W) | Fall Career Fair | |
| October 13 (M) | Indigenous People Day | |
| October 13 (M) - 14 (Tu) | Fall Break - no classes | |
| October 17 (F) - 18 (Sa) | Alumni and Family Weekend | |
| October 20 (M) | Last Day of Session I | |
| October 20 (M) | 33rd instructional day; CSTB Submission Deadline; end of Session I | |
| October 21 (Tu) | First day of Session II | |
| October 27 (M) | Last day to add a course for session II offering | |
| October 29 (W) | Fall Gathering Day - no classes | |
| October 30 (Th) | Olin Monday, Monday classes in session | |
| November 6 (Th) | Last day to drop; declare pass/no credit for full semester offering | |
| November 9 (Su) - 10 (M) | Office of Admission and Financial Aid: Mix & Mingle Fly-in | |
| November 11 (Tu) | Veteran's Day - no classes | |
| November 14 (F) | Olin Tuesday, Tuesday classes in session | |
| November 17 (M) | Tentative start for Spring 2026 Registration | |
| November 21 (F) | Last day to drop; declare pass/no credit for a session II course | |
| November 24 (M) -28 (F) | Thanksgiving Break - no classes | |
| December 12 (F) | Deadline for course withdrawal and incomplete grade petitions | |
| December 12 (F) | Last day of instruction, Fall Semester | |
| December 12 (F) | CSTB Submission Deadline | |
| December 15 (M) | Study Day | |
| December 16 (Tu) - 19 (F) | Final Assessments | |
| December 20 (Sa) | Residence Halls close at noon | |
| December 20 (Sa) - January 20 (Tu) | Intersession – no classes | |
| January 2 (F) | All Grades due for all Fall 2025 semester and outstanding Incompletes from Spring 2025 | |
| SPRING 2026 | ||
| January 19 (M) | Martin Luther King Day | |
| January 19 (M) | Returning Student Arrival - Residence halls open, starting at noon (first meal is dinner) | |
| January 21 (W) | First day of instruction, Spring Semester | |
| January 27 (Tu) | Last day to add a course for session I offering | |
| February 3 (Tu) | Last day to add a course for full semester offering | |
| February 3 (Tu) | Passionate Pursuit Application and Credit Deadline | |
| February 3 (Tu) | Co-Curricular Registration Deadline | |
| February 3 (Tu) | Independent Study, Research Registration Deadline | |
| February 16 (M) | Presidents’ Day – no classes | |
| February 19 (Th) | Olin Monday – Monday class schedule in effect | |
| February 20 (F) - 21 (Sa) | Office of Admission and Financial Aid: Candidates Weekend 1 | |
| February 23 (M) | Last day to drop; declare pass/no credit for a session I course | |
| February 25 (W) | Spring Career Fair | |
| February 27 (F) - 28 (Sa) | Office of Admission and Financial Aid: Candidates Weekend 2 | |
| March 4 (W) | Tentative Course Fair date for 2026-27 Course Offerings | |
| March 6 (F) - 7 (Sa) | Office of Admission and Financial Aid: Candidates Weekend 3 | |
| March 9 (M) | Mid-point of semester; 33rd instructional day; CSTB Submission Deadline | |
| March 10 (Tu) | First day of Session II | |
| March 11 (W) | Olin Monday – Monday class schedule in effect | |
| March 16 (M) - March 20 (F) | Spring Break - no classes | |
| March 23 (M) | Last day to add a course for session II offering | |
| April 1 (W) | Last day to drop; declare pass/no credit for full semester offering | |
| April 14 (Tu) | Tentative start date for Fall 2026 Registration | |
| April 15 (W) | Last day to drop; declare pass/no credit for a session II course | |
| April 20 (M) | Patriots Day – no classes | |
| April 30 (Th) | Last day of instruction, Spring Semester and Session II offerings | |
| April 30 (Th) | CSTB Submission Deadline | |
| April 30 (Th) | Deadline for any session II or full semester course withdrawal and any incomplete grade petitions | |
| May 1 (F) | Study Day | |
| May 4 (M) - May 7 (Th) | Final Assessment Period | |
| TBD | Affordable Design and Entrepreneurship (ADE) Showcase | |
| May 8 (F) | Olin Exposition (tbd) | |
| May 9 (Sa) | Residence Halls close at 12 noon for all except graduating seniors | |
| May 11 (M) | Grading Deadline for all Graduating Seniors | |
| May 11 (M) | SCOPE SUMMIT presentations (required for SCOPE seniors) | |
| May 15 (F) | Commencement for Class of ‘26 | |
| May 16 (Sa) | Residence Halls close at noon for graduating seniors | |
| May 21 (Th) | Grading Deadline for all Spring 2026 courses and any outstanding Fall 2025 incompletes |
*updated 11/19/2025
Constitution Day
Consult the yearly links above/events schedules for specific information.
Religious Observances
Massachusetts state law regarding student absence due to religious beliefs has been adopted by Olin College as follows: “Any student who is unable to attend classes or participate in any examination, study, or work requirement on a particular day because of his or her religious beliefs is excused from any such activity. The student will be given the opportunity to make up the work that was missed, provided that the makeup work does not create an unreasonable burden upon the college. The college will not level fees or charges of any kind when allowing the student to make up missed work. In addition, no adverse or prejudicial effects will result because students have made use of these provisions.”
The online interfaith calendar is commonly used by community members to identify dates for specific religious observances each year.