Academic Calendars: Graduate Spring 2026 | OU Online OU OnlineGraduate Spring 2026Academic Calendars Online Spring A: January 20 to March 13 (8 Weeks) Event/ActivityDateApplication DeadlineJanuary 5Martin Luther King Jr. Day Holiday: No Live SessionsJanuary 19Classes StartJanuary 20Last day to add without the instructor’s permissionJanuary 21Last day to drop & receive 100% refundJanuary 23Classes EndMarch 13Grades DueMarch 17 Online Spring B: March 16 to May 8 (8 Weeks) Event/ActivityDateApplication DeadlineMarch 2Classes StartMarch 16Last day to add without the instructor’s permissionMarch 18Last day to drop & receive 100% refundMarch 20Classes EndMay 8Grades DueMay 12 Online Spring C: January 20 to May 8 (16 Weeks) Event/ActivityDateApplication DeadlineJanuary 5Martin Luther King Jr. Day Holiday: No Live SessionsJanuary 19Classes StartJanuary 20Last day to add without the instructor’s permissionJanuary 23Last day to drop & receive 100% refundFebruary 2Classes EndMay 8Grades DueMay 12