SSCS follows Seminole County Public School Calendar.
SEMINOLE SCIENCE CHARTER SCHOOL
2021–2022 ACADEMIC CALENDAR
| August 2-9 | Pre-Planning / Staff Professional Development |
| August 10 | First Day of School for Students |
| August 10 | Beginning of 1st Marking Period |
| September 6 | Holiday (Labor Day) |
| October 7 | End of 1st Marking Period |
| October 8 | School Closed - Staff Professional Development |
| October 11 | Beginning of 2st Marking Period |
| November 22-26 | Thanksgiving Break |
| December 15-17 | Early Release |
| December 17 | End of 2nd Marking Period |
| December 20-January 4 | Winter Break |
| January 3-4 | School Closed - Staff Professional Development |
| January 5 | Beginning of 3rd Marking Period |
| January 17 | Holiday (Martin Luther King Jr. Day) |
| February 21 | Holiday (Presidents Day) |
| March 11 | End of 3rd Marking Period |
| March 14-18 | Spring Break |
| March 21 | School Closed - Staff Professional Development |
| March 22 | Begin 4th Marking Period |
| May 23, 24,25 | Early Release |
| May 25 | End of 4th Marking Period |
| May 25 | Last Day for Students |