Calendar
The following dates are subject to change as the university makes decisions regarding the 2025–2026 academic year. Changes will be posted online on the School of the Environment’s website.
Fall 2025
| Aug. 8 | F | International Student Orientation |
| Aug. 11–14 | M–TH | Orientation events and MODs for all incoming students |
| Aug. 18 | M | Fall 2025 course registration opens |
| Aug. 18–21 | M–TH | Orientation events and MODs for all incoming students |
| Aug. 26 | T | Orientation events for all incoming students Community Day for all YSE students Fall 2025 preferred-course registration deadline |
| Aug. 27 | W | Fall full-term and Fall-1 courses begin |
| Sept. 1 | M | Labor Day; classes do not meet (make-up classes are managed separately by each course and are not centrally scheduled) |
| Sept. 9 | T | Last day to add a Fall-1 or full-semester course |
| Sept. 16 | T | Last day to drop a Fall-1 course without penalty |
| Oct. 3 | F | Fall-1 courses end |
| Oct. 6 | M | Fall-1 final examinations begin |
| Oct. 10 | F | Fall-1 final examinations end |
| Oct. 14 | T | October recess begins, 7:30 p.m. |
| Oct. 17 | F | Last day to add a Fall-2 course |
| Oct. 20 | M | Fall-2 classes begin; full-term classes resume, 8:20 a.m. |
| Oct. 24 | F | Midterm Last day to drop a Fall-2 or full-semester course without penalty |
| Nov. 21 | F | November recess begins, 7:30 p.m. |
| Dec. 1 | M | Classes resume, 8:20 a.m. |
| Dec. 5 | F | Classes end; reading period begins, 5:30 p.m. Last day to withdraw from a Fall-2 or full-semester course with penalty, 5 p.m. |
| Dec. 11 | TH | Final examinations begin, 7 p.m. |
| Dec. 17 | W | Fall term ends; winter recess begins 5 p.m. |
Spring 2026
| Jan. 2 | F | Fall-term grades due |
| Jan. 5 | M | Spring 2026 registration opens, 8 a.m. |
| Jan. 11 | SU | Spring 2026 preferred-course registration deadline |
| Jan. 12 | M | Spring full-term and Spring-1 courses begin, 8:20 a.m. |
| Jan. 19 | M | Martin Luther King Jr. Day; classes do not meet (make-up classes are managed separately by each course and are not centrally scheduled) |
| Jan. 26 | M | Last day to add a Spring-1 or full-semester course |
| Jan. 30 | F | Last day to drop from a Spring-1 course without penalty, 5 p.m. |
| Feb. 20 | F | Spring-1 courses end, 7:30 p.m. |
| Feb. 23 | M | Spring-1 final examinations begin |
| Feb. 27 | F | Spring-1 final examinations end |
| Mar. 2 | M | Spring-2 courses begin |
| Mar. 6 | F | Midterm; spring recess begins, 7:20 p.m. Last day to drop a Spring-2 or full-semester course without penalty |
| Mar. 23 | M | Classes resume, 8:30 a.m. |
| Apr. 24 | F | Classes end; reading period begins, 5:30 p.m. Last day to withdraw from Spring-2 or full-term course with penalty, 5 p.m. |
| Apr. 30 | TH | Final examinations begin, 7 p.m. |
| May 6 | W | Final examinations end; Spring-2 and Spring full-term ends, 5:30 p.m. |
| May 12 | T | Spring-term grades due for graduating students |
| May 18 | M | University Commencement |
| May 31 | SU | Spring-term grades due for continuing students |