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 2025
Variable Sessions
Monday, June 2
- First class day.
- Last day to add this class.
Tuesday, June 3
- Last day to drop this class without tuition/fee charges and a W grade (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 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 grade will post to your transcript.
Monday, June 16
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, June 17
- Last class day.
Wednesday, June 18
- First class day.
- Last day to add this class.
Friday, June 20
- Last day to drop this class without tuition/fee charges and a W grade (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, June 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 grade will post to your transcript.
Wednesday, July 2
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, July 3
- Last class day.
Monday, July 7
- First class day.
- Last day to add this class.
Tuesday, July 8
- Last day to drop this class without tuition/fee charges and a W grade (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 16
- 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 grade will post to your transcript.
Monday, July 21
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, July 22
Last class day
Wednesday, July 23
- First class day.
- Last day to add this class.
Thursday, July 24
- Last day to drop this class without tuition/fee charges and a W grade (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, Aug. 1
- 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 grade will post to your transcript.
Wednesday, Aug. 6
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, Aug. 7
- Last class day.
Monday, June 2
- First class day.
- Last day to add this class.
Tuesday, June 3
- Last day to drop this class without tuition/fee charges and a W grade (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 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 grade will post to your transcript.
Monday, June 16
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, June 17
- Last class day.
Monday, July 7
- First class day.
- Last day to add this class.
Tuesday, July 8
- Last day to drop this class without tuition/fee charges and a W grade (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 16
- 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 grade will post to your transcript.
Monday, July 21
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, July 22
- Last class day
Monday, July 7
- First class day.
- Last day to add this class.
Tuesday, July 8
- Last day to drop this class without tuition/fee charges and a W grade (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 16
- 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 grade will post to your transcript.
Monday, July 21
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, July 22
- Last class day.
Wednesday, July 23
- First class day.
- Last day to add this class.
Thursday, July 24
- Last day to drop this class without tuition/fee charges and a W grade (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, Aug. 1
- 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 grade will post to your transcript.
Wednesday, Aug. 6
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, Aug. 7
- Last class day.
Monday, May 19
- First class day.
Tuesday, May 27
- Last day to add this class.
Monday, June 2
- Last day to drop this class without tuition/fee charges and a W grade (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 18
- 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 grade will post to your transcript.
Thursday, August 14
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Friday, August 15
- Last class day.
Saturday, May 17
- First class day.
Monday, May 19
- Last day to add this class.
Wednesday, May 21
- Last day to drop this class without tuition/fee charges and a W grade (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, June 9
- 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 grade will post to your transcript.
Friday, June 20
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Saturday, June 21
- Last class day.
Monday, Aug. 4
- First class day.
- Last day to add this class.
- Last day to drop this class without tuition/fee charges and a W grade (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. 6
- 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 grade will post to your transcript.
Thursday, Aug. 7
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Friday, Aug. 8
- Last class day.
Monday, Aug. 11
- First class day.
- Last day to add this class.
- Last day to drop this class without tuition/fee charges and a W grade (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. 13
- 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 grade will post to your transcript.
Thursday, Aug. 14
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Friday, Aug. 15
- Last class day.
Tuesday, July 8
- First class day.
Thursday, July 10
- Last day to add this class.
Monday, July 14
- Last day to drop this class without tuition/fee charges and a W grade (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, August 1
- 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 grade will post to your transcript.
Wednesday, August 13
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, August 14
- Last class day.
Tuesday, May 27
- First class day,
Wednesday, May 28
- Last day to add this class.
Friday, May 30
- Last day to drop this class without tuition/fee charges and a W grade (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 18
- 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 grade will post to your transcript.
Monday, June 30
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, July 1
- Last class day.
Thursday, July 10
- First class day.
Friday, July 11
- Last day to add this class.
Tuesday, July 15
- Last day to drop this class without tuition/fee charges and a W grade (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, Aug. 1
- 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 grade will post to your transcript.
Wednesday, Aug. 13
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, Aug. 14
- Last class day.
Fall 2025
Spring 2025
Variable Sessions
Tuesday, Jan. 14
- First class day.
Wednesday, Jan. 22
- Last day to add this class.
Wednesday, Jan. 29
- Last day to drop this class without tuition/fee charges and a W grade (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, March 18
- 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 grade will post to your transcript.
Wednesday, April 23
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Thursday, April 24
- Last class day.
Tuesday, Jan. 14
- First class day.
Tuesday, Jan. 21
- Last day to add this class.
Monday, Jan. 27
- Last day to drop this class without tuition/fee charges and a W grade (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, March 6
- 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 grade will post to your transcript.
Monday, April 7
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Tuesday, April 8
- Last class day.
Wednesday, Jan. 15
- First class day.
Thursday, Jan. 23
- Last day to add this class.
Thursday, Jan. 30
- Last day to drop this class without tuition/fee charges and a W grade (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, March 18
- 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 grade will post to your transcript.
Tuesday, April 22
- Last day to withdraw from this session; you'll be assessed 100% of tuition and W grades will post to your transcript.
Wednesday, April 23
- Last class day.