Dates and Deadlines

Application Deadlines

Fall 2025

  Application Available Now

  July 25, 2025: Final application deadline

  September 2, 2025: Program start date

Spring 2026

  Application Available Now

  December 9, 2025: Final application deadline

  TBD: Program start date

Dates and Deadlines

For a complete list of dates and deadlines for the fall and spring semesters, visit the Academic Calendar. Dates and deadlines for the summer term can be found in the Variable Session Calendar. Dates are subject to change.

Summer 2025

Full Session (13 weeks)

EventSemester Dates
Classes BeginMay 19
Last Day to Add a Class (11:59 p.m.)**May 27
Last Day to Drop a Class Without Penalty (11:59 p.m.)***June 2
Last Day to Drop a Class (11:59 p.m.)^July 18
Last Day to Withdraw from the Semester (11:59 p.m.)^^August 14
Last Day of ClassesAugust 15

13-Week Session

EventDate
Course Enrollment BeginsMarch 31
13-Week Session Classes BeginSeptember 2
Deadline to Add a Class†September 9
Deadline to Drop++, 100% Tuition AdjustmentSeptember 15
Deadline to Withdraw**, 60% Tuition AdjustmentSeptember 22
Deadline to Withdraw**, 40% Tuition AdjustmentSeptember 29
Deadline to Withdraw** without Petitioning^, No Tuition AdjustmentOctober 30
Deadline to Withdraw*** from the SemesterDecember 4
Classes EndDecember 5

All times are in Mountain Time.
† Add a class by 11:59 p.m. online using Buff Portal. Adding a class after the start-date requires program director and instructor approval.
++ Drop a class by 11:59 p.m. online using Buff Portal or by email to info.online@colorado.edu.
** Withdraw by 11:59 p.m. online using Buff Portal or by email to info.online@colorado.edu. A notation of W will appear on your transcript.
*** Withdraw by 11:59 p.m. by email to info.online@colorado.edu. A grade of W will appear on your transcript.
^ Petitioning is designed to provide students who experience unavoidable, extenuating circumstances the opportunity to waive a University policy that, if enforced, would result in unsatisfactory academic progress or financial consequences. For more information, please contact info.online@colorado.edu. 

* See Academic Calendar and Withdraw from the Semester. Drop by 11:59 p.m. online using Buff Portal. Continuing students who drop all Main Campus classes are eligible for a full refund of their tuition, fees, and confirmation deposit.  
** Add or swap a class by 11:59 p.m. online using Buff Portal. See Add a Course or Swap a Course. 
*** Drop a class by 11:59 p.m. online using Buff Portal. After this date, students who drop a Main Campus class but remain enrolled in the semester are required to pay 100 percent of tuition and fees (no refund), and a W grade is posted to their transcript. See Drop a Course.
^ Drop by 11:59 p.m. online using Buff Portal. Students who drop a class but remain enrolled in the session are required to pay 100 percent of tuition and fees (no refund), and a W grade is posted to their transcript for the dropped course. See Academic Calendar and Drop a Class.
^^ See Academic Calendar and Withdraw from the Semester. Students who drop all classes in this session are required to pay 100 percent of tuition and fees (no refund), and W grades are posted to transcripts.