Special Session Calendars
Main Campus Calendars By Topic
Main Campus Calendars By Special Session
The calendars on this page apply to Main Campus special session classes.
For Colorado Law and all other classes, see "Other CU Calendars" above.
Summer 2026
Variable Sessions
Monday, Aug. 10
- First class day.
- Last day to add this class.
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Tuesday, Aug. 11
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, Aug. 12
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, Aug. 13
- Last class day.
Monday, June 1
- First class day.
Tuesday, June 2
- Last day to add this class.
Wednesday, June 3
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, June 17
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Friday, June 26
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Monday, June 29
- Last class day.
Thursday, June 11
- First class day.
- Last day to add this class.
Friday, June 12
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Tuesday, June 23
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Friday, June 26
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Monday, June 29
- Last class day.
Tuesday, May 26
- First class day.
- Last day to add this class.
Wednesday, May 27
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Thursday, June 4
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Tuesday, June 9
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Wednesday, June 10
- Last class day.
Friday, July 17
- First class day.
- Last day to add this class.
Monday, July 20
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Tuesday, July 28
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Friday, July 31
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Monday, Aug. 3
- Last class day.
Tuesday, June 30
- First class day.
- Last day to add this class.
Wednesday, July 1
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Friday, July 10
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, July 15
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, July 16
- Last class day.
Tuesday, June 30
- First class day.
- Last day to add this class.
Wednesday, July 1
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, July 10
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, July 15
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, July 16
- Last class day.
Tuesday, June 30
- First class day.
- Last day to add this class.
Wednesday, July 1
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, July 10
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, July 15
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, July 16
- Last class day.
Tuesday, May 26
- First class day.
- Last day to add this class.
Wednesday, May 27
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Thursday, June 4
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Tuesday, June 9
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Wednesday, June 10
- Last class day.
Friday, July 17
- First class day.
- Last day to add this class.
Monday, July 20
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Tuesday, July 28
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Friday, July 31
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Monday, Aug. 3
- Last class day.
Monday, July 20
- First class day.
Tuesday, July 21
- Last day to add this class.
Wednesday, July 22
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, Aug. 5
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, Aug. 12
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, Aug. 13
- Last class day.
Monday, Aug. 3
- First class day.
- Last day to add this class.
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, Aug. 5
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, Aug. 6
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, Aug. 7
- Last class day.
Monday, Aug. 10
- First class day.
- Last day to add this class.
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, Aug. 12
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Thursday, Aug. 13
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Friday, Aug. 14
- Last class day.
Tuesday, July 7
- First class day.
Thursday, July 9
- Last day to add this class.
Monday, July 13
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Friday, July 31
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, Aug. 12
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, Aug. 13
- Last class day.
Tuesday, July 7
- First class day.
Wednesday, July 8
- Last day to add this class.
Thursday, July 10
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, July 29
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, Aug. 10
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, Aug. 11
- Last class day.
Tuesday, July 7
- First class day.
Thursday, July 9
- Last day to add this class.
Monday, July 13
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Friday, July 31
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, Aug. 12
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, Aug. 13
- Last class day.
Thursday, July 9
- First class day.
Friday, July 10
- Last day to add this class.
Tuesday, July 14
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Friday, July 31
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Wednesday, Aug. 12
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Thursday, Aug. 13
- Last class day.
Tuesday, May 26
- First class day.
Wednesday, May 27
- Last day to add this class.
Friday, May 29
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Wednesday, June 17
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, June 29
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, June 30
- Last class day.
Tuesday, June 2
- First class day.
Wednesday, June 3
- Last day to add this class.
Friday, June 5
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Thursday, June 23
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Thursday, July 2
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Friday, July 3
- Last class day.
Fall 2025
Variable Sessions
Monday, Aug. 25
- First class day.
Thursday, Aug. 28
- Last day to add this class.
Thursday, Sept. 4
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Tuesday, Oct. 7
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Tuesday, Oct. 28
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Wednesday, Oct. 29
- Last class day.
Spring 2026
Variable Sessions
Tuesday, Jan. 13
- First class day.
Tuesday, Jan. 20
- Last day to add this class.
Friday, Jan. 23
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Friday, Feb. 27
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, March 30
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, March 31
- Last class day.
Monday, Jan. 12
- First class day.
Thursday, Jan. 15
- Last day to add this class.
Wednesday, Jan. 21
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Monday, Feb. 23
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Thursday, March 19
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Monday, March 23
- Last class day.
Thursday, Jan. 8
- First class day.
Wednesday, Jan. 14
- Last day to add this class.
Tuesday, Jan. 20
- Last day to drop this class without tuition/fee charges and a W notation (you must remain enrolled in at least one other variable session class).
- Last day to edit your class options.
- Last day to withdraw from the session with a full refund.
Monday, Feb. 23
- Last day to drop this class and remain enrolled in at least one other variable session class. You'll be assessed full tuition, and a W notation will post to your transcript.
Monday, March 23
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W notations will post to your transcript.
Tuesday, March 24
- Last class day.