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As you prepare for the Spring 2024 semester, please keep in mind the following key dates. Deadlines occur at 11:59 p.m. Mountain Time unless otherwise noted.

These dates apply to Main Campus classes that follow the full-semester start and end dates (Jan. 16–May 8, 2024). For other calendars, see our academic calendar webpage.*

Monday, Jan. 8

• Last day to and receive a full refund, less any outstanding charges.

Tuesday, Jan. 9

• for students starting classes on Jan. 16.

Monday, Jan. 15

• Martin Luther King Jr. holiday (no classes; university closed).

Tuesday, Jan. 16

• First day of classes.
• Last day to .

Wednesday, Jan. 24

• Last day to , or for a closed class.
• Last day to .

Wednesday, Jan. 31

• Last day to without penalty.
• Last day to without tuition charges and W grades; a $200 withdrawal fee applies.
• Last day to .

Sunday, Feb. 4

• Last day to .

Monday, Feb. 5

• Last day to .
• . Students still on the waitlist lose access to that class's online materials, but may be eligible to in the course the next time it's offered.

Tuesday, Feb. 13

• Last day to .

Friday, March 22

• Last day to .
• Last day to .

Monday, March 25–Friday, March 29

• Spring break (no classes; university closed March 29).

Thursday, May 2

• Last day of classes.
• Last day to .

Saturday, May 4–Wednesday, May 8

• .

* If you’re enrolled in any class that doesn’t meet for the full 16 weeks, it’s a special session class. Special session classes follow different deadlines than full-semester classes (view the special session calendar). To check the session and view key dates for one of your classes, go to the card in Buff Portal. Select a class to view session information and the “Drop/Swap/Edit This Class” button for related deadlines.

Office of the Registrar | University of Colorado Boulder
303-492-6970 | registrar@colorado.edu