In the spirit of Christ and the example of Francis of Assisi, the Mission of OSF HealthCare is to serve persons with the greatest care and love in a community that celebrates the Gift of Life.
| 2026-2027 | 2027-2028 | 2028-2029 | 2029-2030 | |
| New Student Orientation and Boot Camp | August 19–20 | August 18–19 | August 23–24 | August 22–23 |
| Classes Begin | August 24 | August 23 | August 28 | August 27 |
| Opening Mass | August 31 | August 30 | September 11 | September 10 |
| Last Day to Add/Drop 1st 7.5‑Week Courses | August 28 | August 27 | September 1 | August 31 |
| Last Day to Add/Drop 15‑Week Courses | September 2 | September 1 | September 6 | September 5 |
| Labor Day | September 7 | September 6 | September 4 | September 3 |
| Last Day to Withdraw 1st 7.5‑Week Courses | September 23 | September 22 | September 27 | September 26 |
| 1st 7.5‑Week Classes End | October 13 | October 12 | October 17 | October 16 |
| 2nd 7.5‑Week Courses Start | October 14 | October 13 | October 18 | October 17 |
| Last Day to Add/Drop 2nd 7.5‑Week Courses | October 19 | October 18 | October 23 | October 22 |
| Last Day to Withdraw 15‑Week Courses | October 30 | October 29 | November 3 | November 2 |
| Spring and Summer Registration Begins | October 19–November 2 | October 18–November 1 | October 23–November 6 | October 22–November 5 |
| Last Day to Withdraw 2nd 7.5‑Week Courses | November 13 | November 12 | November 17 | November 16 |
| Thanksgiving Holiday | November 23–27 | November 22–26 | November 20–24 | November 19–23 |
| Classes End | December 4 | December 3 | December 8 | December 7 |
| Final Examinations | December 7–11 | December 6–10 | December 11–15 | December 10–14 |
| Fall Commencement | December 12 | December 11 | December 16 | December 15 |
| 2026-2027 | 2027-2028 | 2028-2029 | 2029-2030 | |
| New Student Orientation and Boot Camp | January 6–7 | January 5–6 | January 10–11 | January 9–10 |
| Classes Begin | January 11 | January 10 | January 16 | January 14 |
| Opening Mass | January 25 | January 24 | January 22 | January 28 |
| Last Day to Add/Drop 1st 7.5‑Week Courses | January 15 | January 14 | January 22 | January 18 |
| Martin Luther King Jr. Birthday Observed | January 18 | January 17 | January 15 | January 21 |
| Last Day to Add/Drop 15‑Week Courses | January 20 | January 19 | January 25 | January 23 |
| Last Day to Withdraw 1st 7.5‑Week Courses | February 10 | February 9 | February 15 | February 13 |
| 1st 7.5‑Week Classes End | March 2 | February 29 | March 13 | March 12 |
| 2nd 7.5‑Week Courses Start | March 3 | March 1 | March 14 | March 13 |
| Last Day to Add/Drop 2nd 7.5‑Week Courses | March 15 | March 13 | March 19 | March 18 |
| Last Day to Withdraw 15‑Week Courses | March 25 | March 24 | March 29 | March 29 |
| Fall Registration Begins | March 29–April 9 | March 27–April 7 | March 26–April 6 | March 25–April 5 |
| Last Day to Withdraw 2nd 7.5‑Week Courses | April 9 | April 7 | April 13 | April 12 |
| Spring Break | March 8–12 | March 6–10 | March 5–9 | March 4–8 |
| Good Friday – No Classes | March 26 | April 14 | March 30 | April 19 |
| Classes End | April 23 | April 21 | April 27 | April 26 |
| Final Examinations | April 26–30 | April 24–28 | April 30–May 4 | April 29–May 3 |
| Spring Commencement | May 15 | April 29 | May 5 | May 4 |
| 2026-2027 | 2027-2028 | 2028-2029 | 2029-2030 | |
| Classes Begin | May 10 | May 8 | May 14 | May 13 |
| Last Day to Add/Drop | May 17 | May 15 | May 21 | May 20 |
| Memorial Day – No Classes | May 31 | May 29 | May 28 | May 27 |
| Independence Day – No Classes | July 5 | July 4 | July 4 | July 4 |
| Last Day to Withdraw | June 25 | June 23 | June 29 | June 28 |
| Classes End | July 16 | July 14 | July 20 | July 19 |
| Final Examinations | July 19–23 | July 17–21 | July 23–27 | July 22–26 |