There are six 8-week sessions per year. Enrollment opens 2 weeks before the first day of class and ends 2 weeks before all coursework is due. All for-credit coursework is due by the last day of the 8-week session.

2022 Sessions

Enrollment Open: Dec 27 – Feb 18  |  Course Session: Jan 10 – Mar 4 

  • Dec 20 (2021), 9:00 a.m. MT | Enrollment Opens – Enrollment opening 1 week early due to CU being closed during the last week of 2021
  • Dec 24–Jan 2 | University closed – The University of Colorado Boulder will be closed at this time, including technical support for enrollment. Please plan accordingly and expect delays in response to any communications sent to the university during that time.
  • Jan 10, 9:00 a.m. MT | Classes Start
  • Jan 10, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Jan 23, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Feb 18, 5:00 p.m. MT | Enrollment Closes
  • Mar 01, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Mar 01, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Mar 04, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Mar 04, 4:50 p.m. MT | Deadline to Review Your Peers
  • Mar 04, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Spring 1 Calendar  

Enrollment Open: Feb 21 – Apr 15  |  Course Session: Mar 7 – Apr 29 

  • Feb 21, 9:00 a.m. MT | Enrollment Opens
  • Mar 07, 9:00 a.m. MT | Classes Start
  • Mar 07, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Mar 20, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Apr 15, 5:00 p.m. MT | Enrollment Closes
  • Apr 26, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Apr 26, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Apr 29, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Apr 29, 4:50 p.m. MT | Deadline to Review Your Peers
  • Apr 29, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Spring 2 Calendar  

Enrollment Open: Apr 18 – Jun 10  |  Course Session: May 2 – Jun 24 

  • Apr 18, 9:00 a.m. MT | Enrollment Opens
  • May 2, 9:00 a.m. MT | Classes Start
  • May 2, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • May 15, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Jun 10, 5:00 p.m. MT | Enrollment Closes
  • Jun 21, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Jun 21, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Jun 24, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Jun 24, 4:50 p.m. MT | Deadline to Review Your Peers
  • Jun 24, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Summer 1 Calendar  

Enrollment Open: Jun 13 – Aug 5  |  Course Session: Jun 27 – Aug 19 

  • Jun 13, 9:00 a.m. MT | Enrollment Opens
  • Jun 27, 9:00 a.m. MT | Classes Start
  • Jun 27, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Jul 10, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Aug 05, 5:00 p.m. MT | Enrollment Closes
  • Aug 16, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Aug 16, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Aug 19, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Aug 19, 4:50 p.m. MT | Deadline to Review Your Peers
  • Aug 19, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Summer 2 Calendar  

Enrollment Open: Aug 8 – Sep 30  |  Course Session: Aug 22 – Oct 14 

  • Aug 08, 9:00 a.m. MT | Enrollment Opens
  • Aug 22, 9:00 a.m. MT | Classes Start
  • Aug 22, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Sep 04, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Sep 30, 5:00 p.m. MT | Enrollment Closes
  • Oct 11, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Oct 11, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Oct 14, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Oct 14, 4:50 p.m. MT | Deadline to Review Your Peers
  • Oct 14, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Fall 1 Calendar  

Enrollment Open: Oct 3 – Nov 25  |  Course Session: Oct 17 – Dec 9 

  • Oct 03, 9:00 a.m. MT | Enrollment Opens
  • Oct 17, 9:00 a.m. MT | Classes Start
  • Oct 17, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Oct 30, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Nov 25, 5:00 p.m. MT | Enrollment Closes
  • Dec 06, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Dec 06, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Dec 09, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Dec 09, 4:50 p.m. MT | Deadline to Review Your Peers
  • Dec 09, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2022 Fall 2 Calendar  

2021 Sessions

Enrollment Open: Apr 19 – Jun 11  |  Course Session: May 3 – Jun 25 

  • Apr 19, 9:00 a.m. MT | Enrollment Opens
  • May 03, 9:00 a.m. MT | Classes Start
  • May 03, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • May 16, 11:59 p.m. MT | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Jun 11, 5:00 p.m. MT | Enrollment Closes
  • Jun 22, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Jun 22, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Jun 25, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Jun 25, 4:50 p.m. MT | Deadline to Review Your Peers
  • Jun 25, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2021 Summer 1 Calendar  

Enrollment Open: Jun 14 – Aug 6  |  Course Session: Jun 28 – Aug 20

  • Jun 14, 9:00 a.m. MT | Enrollment Opens
  • Jun 28, 9:00 a.m. MT | Classes Start
  • Jun 28, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Jul 11, 11:59 p.m. | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Aug 06, 5:00 p.m. MT | Enrollment Closes
  • Aug 17, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Aug 17, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Aug 20, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Aug 20, 4:50 p.m. MT | Deadline to Review Your Peers
  • Aug 20, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2021 Summer 2 Calendar  

Enrollment Open: Aug 9 – Oct 1 | Course Session: Aug 23 – Oct 15

  • Aug 09, 9:00 a.m. MT | Enrollment Opens
  • Aug 23, 9:00 a.m. MT | Classes Start
  • Aug 23, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Sep 05, 11:59 p.m. | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Oct 01, 5:00 p.m. MT | Enrollment Closes
  • Oct 12, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Oct 12, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Oct 15, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Oct 15, 4:50 p.m. MT | Deadline to Review Your Peers
  • Oct 15, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2021 Fall 1 Calendar  

Enrollment Open: Oct 4 – Nov 26 | Course Session: Oct 18 – Dec 10

  • Oct 04, 9:00 a.m. MT | Enrollment Opens
  • Oct 18, 9:00 a.m. MT | Classes Start
  • Oct 18, 9:00 a.m. MT | ProctorU final exam scheduling begins – Do this as soon as possible! Must schedule exams 72+ hours in advance. The longer you wait, the fewer available spots.
  • Oct 31, 11:59 p.m. | Deadline to petition for a refund for any classes enrolled in before classes started – Must drop class & submit petition within 14 days of registration and before accessing final assessment (See details: MS-DS Handbook)
  • Nov 25-26 | University closed – Email responses may be delayed during this time. We appreciate your understanding!
  • Nov 26, 5:00 p.m. MT | Enrollment Closes
  • Dec 07, 4:50 p.m. MT | Deadline to Schedule ProctorU Exams
  • Dec 07, 4:50 p.m. MT | Deadline to Submit Peer-graded Assignments
  • Dec 10, 4:50 p.m. MT | Deadline to complete ProctorU Exams
  • Dec 10, 4:50 p.m. MT | Deadline to Review Your Peers
  • Dec 10, 11:59 p.m. MT | Classes End – Deadline to access & submit all remaining graded items

2021 Fall 2 Calendar