Adelphi University Academic Calendar 2025-2026: Vital Dates

Adelphi University Academic Calendar 2025-2026 is your essential guide to important dates and deadlines such as class start dates, add/drop deadlines, breaks, and final exams for undergraduate and graduate programs.

Planning your educational journey at Adelphi University? Whether you’re a prospective student aiming for admission deadlines, a current student needing to track course registration or exam schedules, or faculty/staff coordinating academic operations, understanding the Adelphi Academic Calendar 2025-2026 is essential.

Adelphi’s academic year is approximately 30 weeks of instruction across its two primary 15-week semesters: Fall and Spring.

In addition to these main terms, the university offers a concentrated Intersession (about three weeks) and flexible Summer Sessions, providing diverse learning opportunities.

This guide compiles all the important dates of Adelphi University, ensuring you stay organized and on track for a successful academic year.

Adelphi University Academic Calendar Fall 2025

The Adelphi University academic calendar for fall 2025 has the following key dates and deadlines.

1. Adelphi move-in day for fall 2025 is from Thursday, August 21, 2025, to Saturday, August 23, 2025. First-Year Student Move-in on Thursday, August 21, 2025, from 10:00 a.m. until 5:00 p.m. Returning Student Move-in on Saturday, August 23, 2025, from 10:00 a.m. until 5:00 p.m.
2. Adelphi Fall 2025 Semester Classes Start on Monday, August 25, 2025. It is the first day of classes.
3. Labor Day Weekend (No Classes) runs from Saturday, August 30, 2025, to Monday, September 1, 2025.
4. Last Day to Add/Drop Courses, Change Sections, or Grading Methods is Monday, September 8, 2025.
5. Indigenous Peoples’ Day (No Classes) occurs from Saturday, October 11, 2025, to Monday, October 13, 2025.
6. Spring 2026 Registration Planning Opens on Tuesday, October 14, 2025, according to the Adelphi Academic Calendar 2026.
7. Graduate Registration for Spring 2026 Begins on Wednesday, October 29, 2025.
8. Undergraduate Registration for Spring 2026 Begins on Friday, October 31, 2025.
9. Election Day (No Classes) is Tuesday, November 4, 2025.
10. Last Day to Withdraw from Courses is Wednesday, November 19, 2025.
11. Thanksgiving Break (No Classes) runs from Wednesday, November 26, 2025, to Sunday, November 30, 2025.
12. Makeup/Study Days (No Classes) are Tuesday, December 9, 2025, and Wednesday, December 10, 2025.
13. Final Exams run from Thursday, December 11, 2025, to Wednesday, December 17, 2025.

Adelphi University Academic Calendar Winter Intersession 2026

Maximize Adelphi’s intensive January 2026 Intersession: critical deadlines for condensed courses and holiday closures.

1. Intersession Classes Begin on Monday, January 5, 2026.
2. Last Day to Add/Drop Courses or Modify Grading/Sections is Tuesday, January 6, 2026.
3. Martin Luther King Jr. Day (No Classes) is Monday, January 19, 2026.
4. Last Day to Withdraw from Courses is Wednesday, January 21, 2026.
5. Intersession Classes End on Friday, January 23, 2026, according to the Adelphi Academic Calendar 2025-2026.

Adelphi University Academic Calendar Spring 2026

Navigate Spring 2026 at Adelphi: registration windows, spring break, conference days, and commencement deadlines.

1. Spring 2026 Semester Classes Begin on Monday, January 26, 2026.
2. The Last Day to Add/Drop Courses or Modify Grading/Sections is Friday, February 6, 2026.
3. Summer/Fall 2026 Registration Planning Opens on Monday, March 9, 2026.
4. Adelphi Spring Break 2026 runs from Monday, March 16, 2026, to Sunday, March 22, 2026. Classes resume on Monday, March 23, 2026.
5. Summer 2026 Registration Begins on Monday, March 23, 2026.
6. Graduate Registration for Fall 2026 Begins on Tuesday, April 1, 2026.
7. Undergraduate Registration for Fall 2026 Begins on Thursday, April 3, 2026, according to Adelphi University Academic Calendar 2026-2027.
8. The Last Day to Withdraw from Courses is Tuesday, April 22, 2026.
9. Scholarship and Creative Works Conference (No Classes) is on Monday, April 28, 2026.
10. Makeup/Study Days (No Classes) are Monday, May 11, 2026, and Tuesday, May 12, 2026.
11. Final Exams run from Wednesday, May 13, 2026, to Tuesday, May 19, 2026.
12. Doctoral Hooding Ceremony is Wednesday, May 20, 2026.
13. Commencement is Thursday, May 21, 2026.

Adelphi University Academic Calendar Summer 2026

Check Adelphi’s Summer 2026 sessions: key deadlines for Summer I, Full Summer, and Summer II courses with holiday breaks.

1. All Summer Sessions Begin on Tuesday, May 26, 2026.
2. Summer I: Last Day to Add/Drop Courses or Modify Grading/Sections is Thursday, May 29, 2026.
3. Full Summer: Last Day to Add/Drop Courses or Modify Grading/Sections is Wednesday, June 3, 2026.
4. Juneteenth (No Classes) is Friday, June 19, 2026.
5. Summer I: Last Day to Withdraw is Tuesday, June 23, 2026, according to Adelphi University Academic Calendar 2026.
6. CONVERSION DAY (Friday Classes Meet) is Monday, June 30, 2026.
7. Summer Session I Ends on Tuesday, June 30, 2026.
8. Independence Day Break (No Classes) runs from Tuesday, July 1, 2026, to Saturday, July 5, 2026.
9. Summer Session II Classes Begin on Monday, July 6, 2026.
10. Summer II: Last Day to Add/Drop Courses or Modify Grading/Sections is Thursday, July 9, 2026.
11. Full Summer: Last Day to Withdraw is Thursday, July 24, 2026.
12. Summer II: Last Day to Withdraw is Wednesday, July 31, 2026.
13. All Summer Sessions End on Saturday, August 9, 2026.

This calendar does not apply to Adelphi International (AUI) General English Language, Adelphi Special Sessions courses, or Online Programs for Sport Management, Nutrition, Health Informatics, Social Sciences, and other Online programs in the College of Professional and Continuing Studies.