Complete school year calendar for Commack UFSD — one of Suffolk County's largest and highest-performing school districts on Long Island. Includes all holidays, breaks, half days, and important dates from September 2025 through June 2026.
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | September 2, 2025 (Tue) | School Opens |
| Labor Day | September 1, 2025 (Mon) | No School |
| Rosh Hashanah | September 23–24, 2025 (Tue–Wed) | No School |
| Yom Kippur | October 2, 2025 (Thu) | No School |
| Columbus Day | October 13, 2025 (Mon) | No School |
| Veterans Day | November 11, 2025 (Tue) | No School |
| Thanksgiving Recess | November 26–28, 2025 (Wed–Fri) | No School |
| Winter Recess | Dec 24, 2025 – Jan 2, 2026 | No School |
| Martin Luther King Jr. Day | January 19, 2026 (Mon) | No School |
| Mid-Winter Recess | February 16–20, 2026 (Mon–Fri) | No School |
| Eid al-Fitr | March 20, 2026 (Fri) | No School |
| Spring Recess | April 2–10, 2026 | No School |
| Memorial Day | May 25, 2026 (Mon) | No School |
| Eid al-Adha | May 27, 2026 (Wed) | No School |
| Juneteenth | June 19, 2026 (Fri) | No School |
| Last Day of School | June 26, 2026 (Fri) | School Closes |
Complete month-by-month calendar from September 2025 to June 2026. Every day is color-coded so you can see school days, holidays, and breaks at a glance.
The Commack Union Free School District 2025-2026 school year runs from September 4, 2025 to June 26, 2026. Nestled in western Suffolk County, Commack is an undisputed academic powerhouse serving approximately 6,500 students across 9 schools.
Commack High School stands as one of the largest single high schools on Long Island and holds national distinctions for its STEM programs and International Baccalaureate (IB) integration. The district features a rare dual-middle-school structure (Commack MS and Burr IS), making the official calendar critical for families shuttling kids across multiple tiers of schooling.
For easy reference, use the button at the top of this page to download a free, color-coded printable Commack school calendar for your fridge or desk.
Data Source: Official Commack Union Free School District calendar publication.
Disclaimer: This website is not affiliated with, endorsed by, or connected to Commack Union Free School District or the New York State Education Department (NYSED). For the most current and official calendar, please visit www.commack.k12.ny.us.
Official calendars can still change. Always confirm updates with the district before making plans.
Last updated: March 17, 2026