Students who wish to enroll in a short course must enroll before the start of the course. Proportionate drop and withdrawal dates apply to block and short courses. Consult the Office of the Registrar (Stillwater) or Enrollment Services (Tulsa) for drop and withdrawal deadlines and required fees. You may also view this information at the OSU Office of the Registrar website.
Web enrollment closes at midnight on Wednesday, June 5 for all summer sessions.
| Summer Session 1 (May intersession; class sections numbered 811 [Tulsa] and 211 [Stillwater]) | |
| Final Enrollment Date without late fee | Friday, May 10 |
| Classes Begin | Monday, May 13 |
| Last Day for 100% Refund, Nonrestrictive Add/Drop | Monday, May 13 |
| Last Day for 50% Refund, Restrictive Add/Drop | Tuesday, May 14 |
| Memorial Day (OSU-Tulsa closed) | Monday, May 27 |
| Last day to Drop/Withdraw with automatic “W” | Tuesday, May 28 |
| Last day to Withdraw with assigned “W” or “F” | Wednesday, May 29 |
| Classes End | Friday, May 31 |
| Grades due electronically from faculty | Tuesday, June 4 |
| Summer Session 2 (8-week June/July session; class sections numbered 801 [Tulsa] and 001 [Stillwater]) | |
| Final Enrollment Date without late fee | Friday, May 31 |
| Classes Begin | Monday, June 3 |
| Last Day for 100% Refund, Nonrestrictive Add/Drop | Wednesday, June 5 |
| Last Day for 50% Refund, Restrictive Add/Drop | Friday, June 7 |
| Independence Day (OSU-Tulsa closed) | Thursday, July 4 |
| Last day to Drop/Withdraw with automatic “W” | Friday, July 12 |
| Last Day to Withdraw with assigned “W” or “F” | Friday, July 19 |
| Classes End | Friday, July 26 |
| Grades due electronically from faculty | Tuesday, July 30 |
| Summer Session 3 (June-only session; class sections numbered 831 [Tulsa] and 231 [Stillwater]) | |
| Final Enrollment Date without late fee | Friday, May 31 |
| Classes Begin | Monday, June 3 |
| Last Day for 100% Refund, Nonrestrictive Add/Drop | Tuesday, June 4 |
| Last Day for 50% Refund, Restrictive Add/Drop | Wednesday, June 5 |
| Last day to Drop/Withdraw with automatic “W” | Friday, June 21 |
| Last day to Withdraw with assigned “W” or “F” | Wednesday, June 26 |
| Classes End | Friday, June 28 |
| Grades due electronically from faculty | Tuesday, July 2 |
| Summer Session 4 (July-only session; class sections numbered 841 [Tulsa] and 241 [Stillwater]) | |
| Final Enrollment Date without late fee | Friday, June 28 |
| Classes Begin | Monday, July 1 |
| Last Day for 100% Refund, Nonrestrictive Add/Drop | Tuesday, July 2 |
| Last Day for 50% Refund, Restrictive Add/Drop | Wednesday, July 3 |
| Independence Day (OSU-Tulsa closed) | Wednesday, July 4 |
| Last day to Drop/Withdraw with automatic “W” | Friday, July 19 |
| Last Day to Withdraw with assigned “W” or “F” | Wednesday, July 24 |
| Classes End | Friday, July 26 |
| Grades due electronically from faculty | Tuesday, July 30 |
Proportionate drop** and withdrawal* dates apply to block, short term and late starting classes.
A University holiday falls within this session. If the scheduled classes do not meet, additional class time or assignments may make up the difference.
| Fall pre-session begins | Monday, Aug. 5 |
| Fall pre-session ends | Friday, Aug. 16 |
| Last day to enroll without $50 late enrollment fee | Friday, Aug. 16 |
| First day of classes | Monday, Aug. 19 |
| Last day to enroll or add a class (nonrestrictive) | Monday, Aug. 26 |
| Last day to drop** or withdraw* with no grade (100% refund) | Monday, Aug. 26 |
| SIS Web enrollment for students closes at midnight | Monday, Aug. 26 |
| Last day to add a class (restrictive: requires instructor and advisor signature) | Friday, Aug. 30 |
| Last day to drop** or withdraw* with a grade of “W” (50% refund) | Friday, Aug. 30 |
| Labor Day (OSU-Tulsa closed) | Monday, Sept. 2 |
| Six-week (mid-term) grades due from faculty | Tuesday, Oct. 1 |
| Fall Break (No classes) | Friday, Oct. 11 |
| Last day to file a Diploma Application for Fall graduation | Friday, Nov. 1 |
| Last day to drop** a class (automatic “W”) | Friday, Nov. 8 |
| (Drop by petition only after this date) | |
| Last day to withdraw* from ALL classes (automatic “W”) | Friday, Nov. 8 |
| Last day to withdraw* from ALL classes (assigned “W” or “F”) | Friday, Nov. 22 |
| First Day of Students’ Thanksgiving Break (No classes) | Wednesday, Nov. 27 |
| Thanksgiving Holidays (OSU-Tulsa closed) | Thursday, Nov. 28 – Sunday, Nov. 29 |
| Pre-finals Week | Monday, Dec. 2 - Friday, Dec. 6 |
| Class work ends | Friday, Dec. 6 |
| Finals Week | Monday, Dec. 9 - Friday, Dec. 13 |
| Commencement, OSU-Stillwater Campus (graduate students) | Friday, Dec. 13 |
| Commencement, OSU-Stillwater Campus (undergraduate students) | Saturday, Dec. 14 |
| Final grades due electronically from faculty | Tuesday, Dec. 17 |
Proportionate drop** and withdrawal* dates apply to block, short term and late starting classes.
A University holiday falls within this session. If the scheduled classes do not meet, additional class time or assignments may make up the difference.
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