Complete school year calendar for Syosset CSD — one of Long Island's most academically acclaimed school districts, known for exceptional STEM programs and national rankings. 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 |
| Diwali | October 20, 2025 (Mon) | No School |
| Veterans Day | November 11, 2025 (Tue) | No School |
| Thanksgiving Recess | November 27–28, 2025 (Thu–Fri) | No School |
| Winter Recess | Dec 24, 2025 – Jan 2, 2026 | No School |
| Martin Luther King Jr. Day | January 19, 2026 (Mon) | No School |
| Presidents' Week | February 16–20, 2026 (Mon–Fri) | No School |
| Eid al-Fitr | March 20, 2026 (Fri) | No School |
| Spring Recess | April 2–10, 2026 (Thu–Fri) | 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 Syosset Central School District 2025-2026 school year runs from September 3, 2025 to June 25, 2026. Syosset is consistently ranked as the #1 or #2 school district on Long Island and in the top 10 statewide, serving approximately 6,500 students across 9 schools.
Syosset has one of the largest Asian-American student populations on Long Island and observes Lunar New Year as an official holiday. The district is renowned for its nationally competitive Science Olympiad, debate, and math teams.
The first day for Syosset CSD is Tuesday, September 2, 2025.
Holiday Recess runs from December 24, 2025 – January 2, 2026.
Spring Recess runs from April 2–10, 2026.
The last day is Friday, June 26, 2026.
Yes. Syosset CSD observes Lunar New Year on February 17, 2026. Syosset has one of the largest Asian-American student populations on Long Island, making this holiday particularly significant for the community.
Yes. Syosset CSD is consistently ranked as the #1 or #2 school district on Long Island, competing with Jericho for the top spot and in the top 10 statewide. The district is known for exceptionally high Regents and AP exam scores.
Syosset serves approximately 6,500 students across 9 schools. The district covers Syosset, Woodbury, and parts of Jericho and Muttontown in Nassau County.
Data Source: This calendar is based on projected dates derived from historical Syosset Central School District scheduling patterns.
Disclaimer: This website is not affiliated with, endorsed by, or connected to Syosset Central School District or the New York State Education Department (NYSED). For the most current and official calendar, please visit www.syossetschools.org.
Dates are subject to change. Religious holiday dates are approximate and based on projected lunar calendar calculations.
Last updated: March 11, 2026