| Semester | Start Date | End Date |
| Fall Semester 2024 | Monday, September 9, 2024 | Friday, December 13, 2024 |
| High School Preparation Program | Sunday, August 18 | Sunday, September 1 |
| College Counseling Preparation Program | Sunday, August 18 | Sunday, September 1 |
| New student arrival | Saturday, August 31 | Sunday, September 1 |
| New student orientation | Tuesday, September 3 | Friday, September 6 |
| Returning student arrival | Saturday, September 7 | Sunday, September 8 |
| First Day of Official Fall Classes | Monday, September 9 | |
| Thanksgiving break (Dorms remain open) | Wednesday, November 27 | Sunday, December 1 |
| Winter vacation | Saturday, December 14 | Sunday, January 5, 2025 |
| Spring Semester 2025 | Tuesday, January 7, 2025 | Friday, May 23, 2025 |
| New student orientation | Saturday, January 4 | |
| Spring vacation | Saturday, March 1 | Sunday, March 16 |
| Graduation | Friday, May 16 | |
| Senior class vacate dorms | Saturday, May 17 | |
| End of Semester | Friday, May 23 | |
| Students move out of dorms | Saturday, May 24 |
| Semester | Start Date | End Date |
| Fall Semester 2025 | September 1, 2025 | September 12, 2025 |
| High School Preparation Program | Sunday, August 17 | Sunday, August 31 |
| College Counseling Preparation Program | Sunday, August 17 | Sunday, August 31 |
| New student arrival | Sunday, August 30 | Sunday, August 31 |
| New student orientation | Tuesday, September 2 | Friday, September 5 |
| Returning student arrival | Saturday, September 6 | Sunday, September 7 |
| First Day of Official Fall Classes | Monday, September 8 | |
| Winter vacation | Saturday, December 13 | Sunday, January 4, 2026 |
| Spring Semester 2026 | Monday, January 5, 2026 | Friday, May 22, 2026 |
| New student orientation | Saturday, January 3 | |
| Spring vacation | Saturday, March 7 | Sunday, March 22 |
| Graduation | Friday, May 15 | |
| Senior class vacate dorms | Saturday, May 16 | |
| End of Semester | Friday, May 22 | |
| Students move out of dorms | Saturday, May 23 |
CATS Academy Boston, Inc. is part of a group trading as CATS Global Schools. UK company number: 11493248. Registered address: Suites 6-7 The Turvill Building, Old Swiss, 149 Cherry Hinton Road, Cambridge CB1 7BX, UK
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