The Early College calendars outline important deadlines for classes taught at the high schools.
| Student Application Open for courses at Southern or high schools | May 26 - Jun. 27, 2026 |
| First day of classes at high schools | Jul. 7, 2026 |
| Teacher Roster Verification | Jul. 14, 2026 |
| Teacher Midterm Grades due | Jul. 28, 2026 |
| Student Course Withdrawal deadline for classes at high schools | Aug. 17, 2026 |
| Last day of classes at high schools | Aug. 17, 2026 |
| Teacher Final Grades due | Aug. 20, 2026 |
| Student Grade Transcripts available | Aug. 21, 2026 |
| Teacher Applications Due for AY 2026-27 | Mar. 15, 2026 |
| Student Application Open for Fall and Full-Year courses at Southern | Aug. 5 - Aug 21, 2026 |
| Student Application Open for Fall, Full-Year, and Spring courses at high schools | Aug. 5 - Sep. 10, 2026 |
| Teacher Roster Verification due for Fall and Full-Year classes | Oct. 14, 2026 |
| Teacher Midterm Grades due for Fall classes | Nov. 9, 2026 |
| Student Course Withdrawal deadline for classes at high schools | Dec. 13, 2026 |
| Teacher Final Grades due for Fall classes | Jan. 29, 2027 |
| Teacher Midterm Grades due for Full-Year classes | Jan. 29, 2027 |
| Student Grade Transcripts available | Feb. 1, 2027 |
| Teacher Applications Due for AY 2027-28 | Mar. 15, 2026 |
| Student Application Open for Spring courses at Southern | Nov. 23, 2026 – Jan. 13, 2027 |
| Student Application Open for Spring courses at high schools | Nov. 23, 2026 – Feb. 5, 2027 |
| Teacher Roster Verification due for Spring classes | Feb. 25, 2027 |
| Teacher Midterm Grades due for Spring classes | Mar. 31, 2027 |
| Student Course Withdrawal deadline Spring and Full-Year classes at high schools | May 16, 2027 |
| Teacher Final Grades due for Spring and Full-Year classes | Jun. 25, 2027 |
| Student Grade Transcripts available | Jun. 28, 2027 |
Early College students enrolling in courses held at Southern CT State University are required to follow our primary academic calendar for registration and withdrawal dates.