Princeton University 2025-26 Calendar. See also academic calendars published by the office of the registrar.dateeventaug. 1 sun opening exercises, university chapel 2 29mon labor day 3 tue fall term scheduled classes begin 3 tue undergrad fall term add/drop period begins 13 fri undergrad fall term add.

2, 2024, and the last official day of classes is on dec. Dates are tentative and subject to change before the beginning of the academic year.