| Event | Summer 2025 | Fall 2025 | Winter 2026 | Spring 2026 |
|---|---|---|---|---|
| Registration Begins (after 2pm PT) | Apr 17 | Jul 10 | Oct 16 | Jan 15 |
| Courses Begin* (week of) | Jun 23 | Sep 22 | Jan 5 | Mar 30 |
| Courses End* (week of) | Sep 8 | Dec 8 | Mar 16 | Jun 8 |
*Actual dates may vary by program.
| EVENT | SPRING 2025 | FALL 2025 | WINTER 2026 |
|---|---|---|---|
| UC Irvine schedule of classes available to view | 2/8 | 5/3 | 11/1 |
| *Application opens online (after 12pm PDT/PST) *some departments may not review request until Week 1 | 2/24 | 8/25 | 12/1 |
| Last Day to apply to add a course under the School of Information & Computer Sciences | 3/14 | 9/12 | 12/12 |
| *Last day to apply to add a course (Friday prior to instruction, 4 PM PDT/PST) *some courses may close to enrollments in Week 1 | 3/28 | 9/19 | 1/2 |
| First day of instruction | 3/31 | 9/25 | 1/5 |
| *Last day to apply to drop a course for a refund ($50 service charge per course), or change grade option or variable units, without Dean approval. (Thursday of Week 2, 4pm PDT/PST) *This refund deadline is strictly enforced, and refunds will not be approved after this date. | 4/10 | 10/9 | 1/15 |
| Last day to change variable units or drop course with Dean or departmental approval without receiving W grade | 5/9 | 11/7 | 2/13 |
| Last day to change grade option with Dean or departmental approval | 6/6 | 12/5 | 3/13 |
| Last day to apply to withdraw from a course; W grade assigned. Dean or departmental approval required. (Friday of Week 10, 4pm PDT/PST) | 6/6 | 12/5 | 3/13 |
| Last day of instruction | 6/6 | 12/5 | 3/13 |
| Final Exams | 6/7-6/12 | 12/6-12/12 | 3/14/-3/20 |
Deadlines for Summer courses are available on the Summer Session site.
*Concurrent Enrollment deadlines are different from the UC Irvine Registrar Calendar.
**Concurrent Enrollment add/drop policy mirrors the UC Irvine Registrar.
Undergraduate Success Through Academics and Research (USTAR)
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| USTAR Academic Advancement Track (4 QTRS) | Jan 2 - Dec 12 | Jun 17 - Jun 12, 2026 | Sep 22 - Sep 9, 2026 (No longer accepting applications) | |
| USTAR Program (3 QRTS) | Jan 2 - Sep 10 | Mar 26 - Dec 12 | Sep 22 - Jun 12, 2026 |
Graduate Success Through Academics and Research (GSTAR)
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| GSTAR General Track (2 QTRS) | Jan 2 - Jun 13 | Mar 26 - Sep 10 | Jun 17 - Dec 12 | Sep 22 - Mar 13, 2026 |
| GSTAR General Track (3 QTRS) | Jan 2 - Sep 10 | Mar 26 - Dec 12 | Jun 17 - Mar 13, 2026 | Sep 22 - Jun 12, 2026 |
| GSTAR 3+1 Access with Concentration in Humanities or Data Science and Analytics (3 QTRS) | Jan 2 - Sep 10 | Jun 17 - Mar 13, 2026 | Sep 22 - Jun 12, 2026 | |
| GSTAR 3+1 Access with Concentration in Engineering (3 QTRS) | Jan 2 - Sep 10 | Sep 22 - Jun 12, 2026 |
Academic Study Abroad Programs (ASAP)
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| ASAP General and Specialized Tracks (1 QTR) | Jan 2 - Mar 21 | Mar 26 - Jun 13 | Sep 22 - Dec 12 | |
| ASAP General and Specialized Tracks (2 QTRS) | Jan 2 - Jun 13 | Mar 26 - Sep 10 | Sep 22 - Mar 13, 2026 | |
| ASAP General and Specialized Tracks (3 QTRS) | Jan 2 - Sep 10 | Mar 26 - Dec 12 | Sep 22 - Jun 12, 2026 | |
| ASAP CSL Track (2 QTRS) | Jan 2 - Jun 13 | Mar 26 - Sep 10 | Jun 17 - Dec 12 | Sep 22 - Mar 13, 2026 |
| ASAP CSL Track (3 QTRS) | Jan 2 - Sep 10 | Mar 26 - Dec 12 | Jun 17 - Mar 13, 2026 | Sep 22 - Jun 12, 2026 |
Individualized Study Program (ISP)
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| Individualized Study Program | Jul 21 - Aug 15 Aug 4 - Aug 15 Aug 18 - Aug 29 Sep 2 - Sep 12 |
Language & Communication Program
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| Language & Communication Program | Feb 3 - Mar 14 |
Accelerated Certificate Programs (ACPs)
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| Business Administration | Jan 6 - Mar 21 | Mar 31 - Jun 13 | Jun 23 - Sep 5 | Sep 29 - Dec 12 |
| Creativity & Product Development | Jan 6 - Mar 21 | Jun 23 - Sep 5 | ||
| Data Analytics for Business | Jan 6 - Mar 21 | Jun 23 - Sep 5 | ||
| Data Science | Mar 31 - Jun 13 | Sep 29 - Dec 12 | ||
| Digital Marketing & Communications | Jan 6 - Mar 21 | Mar 31 - Jun 13 | Sep 29 - Dec 12 | |
| Innovation Management & Entrepreneurship | Mar 31 - Jun 13 | Sep 29 - Dec 12 | ||
| International Business Operations & Management | Jan 6 - Mar 21 | Mar 31 - Jun 13 | Jun 23 - Sep 5 | Sep 29 - Dec 12 |
| International Finance | Mar 31 - Jun 13 | Sep 29 - Dec 12 | ||
| Project Management | Mar 31 - Jun 13 | Sep 29 - Dec12 |
Internship Experiences
| Winter 2025 | Spring 2025 | Summer 2025 | Fall 2025 | |
|---|---|---|---|---|
| Internship Experiences | Jan 6 - Mar 21 | Mar 31 - Jun 12 | Jun 23 - Sep 5 | Sep 29 - Dec 12 |
Undergraduate Success Through Academics and Research (USTAR)
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| USTAR Program (3 QTRS) | Jan 5 - Sep 9 | Mar 25 - Dec 11 | Sep 17 - Jun 11, 2027 |
Graduate Success Through Academics and Research (GSTAR)
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| GSTAR General Track (2 QTRS) *Length based on admissions eligibility | Jan 5 - Jun 12 | Mar 25 - Sep 9 | Jun 18 - Dec 11 | Sep 17 - Mar 19, 2027 |
| GSTAR General Track (3 QTRS) *Length based on admissions eligibility | Jan 5 - Sep 9 | Mar 25 - Dec 11 | Jun 18 - Mar 19, 2027 | Sep 17 - Jun 11, 2027 |
| GSTAR 3+1 Access Track (3 QTRS) | Jan 5 - Sep 9 | Jun 18 - Mar 19, 2027 | Sep 17 - Jun 11, 2027 |
Academic Study Abroad Programs (ASAP)
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| ASAP General Track (1 QTR) | Jan 5 - Mar 20 | Mar 25 - Jun 12 | Sep 17 - Dec 11 | |
| ASAP General Track (2 QTRS) | Jan 5 - Jun 12 | Mar 25 - Sep 9 | Sep 17 - Mar 19, 2027 | |
| ASAP General Track (3 QTRS) | Jan 5 - Sep 9 | Mar 25 - Dec 11 | Sep 17 - Jun 11, 2027 | |
| ASAP CSL Track (2 QTRS) | Jan 5 - Jun 12 | Mar 25 - Sep 9 | Jun 18 - Dec 11 | Sep 17 - Mar 19, 2027 |
| ASAP CSL Track (3 QTRS) | Jan 5 - Sep 9 | Mar 25 - Dec 11 | Jun 18 - Mar 19, 2027 | Sep 17 - Jun 11, 2027 |
Individualized Study Program (ISP)
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| Individualized Study Program | Jan 20 - Feb 13 Feb 2 - Feb 13 Feb 17 - Feb 27 Mar 2 - Mar 13 | Jul 20 - Aug 14 Aug 3 - Aug 14 Aug 17 - Aug 28 Aug 31 - Sep 11 |
Accelerated Certificate Programs (ACPs)
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| Business Administration | Jan 5 - Mar 20 | Mar 30 - Jun 12 | Jun 22 - Sep 4 | Sep 24 - Dec 11 |
| Creativity & Product Development | Jan 5 - Mar 20 | Jun 22 - Sep 4 | ||
| Data Analytics for Business | Jan 5 - Mar 20 | Jun 22 - Sep 4 | ||
| Data Science | Mar 30 - Jun 12 | Sep 24 - Dec 11 | ||
| Digital Marketing & Communications | Jan 5 - Mar 20 | Mar 30 - Jun 12 | Jun 22 - Sep 4 | Sep 24 - Dec 11 |
| Innovation Management & Entrepreneurship | Mar 30 - Jun 12 | Sep 24 - Dec 11 | ||
| International Business Operations & Management | Jan 5 - Mar 20 | Mar 30 - Jun 12 | Jun 22 - Sep 4 | Sep 24 - Dec 11 |
| International Finance | Mar 30 - Jun 12 | Sep 24 - Dec 11 | ||
| Project Management | Mar 30 - Jun 12 | Sep 24 - Dec 11 |
Internship Experiences
| Winter 2026 | Spring 2026 | Summer 2026 | Fall 2026 | |
|---|---|---|---|---|
| ACP Internships | Jan 5 - Mar 20 | Mar 30 - Jun 12 | Jun 22 - Sep 4 | Sep 24 - Dec 11 |
| 2025 | 2026 | |
|---|---|---|
| Winter | Mon, Jan 20 Mon, Feb 17 Fri, Mar 28 | Mon, Jan 19 Mon, Feb 16 |
| Spring | Mon, May 26 | Fri, Mar 27 Mon, May 25 |
| Summer | Thu, Jun 19 Fri, Jul 4 Mon, Sep 1 | Fri, Jun 19 Fri, Jul 3 Mon, Sep 7 |
| Fall | Tue, Nov 11 Thu, Nov 27 - Fri, Nov 28 Wed, Dec 24 - Thu, Jan 1, 2026 | Wed, Nov 11 Thu, Nov 26 - Fri, Nov 27 Thu, Dec 24 - Fri, Jan 1, 2027 |
*Additional information regarding holidays can be found on our webpage on Religious Accommodation and Observance.