Complete school year calendar for Half Hollow Hills Central School District (Long Island). Includes all holidays, breaks, and important dates. Includes all holidays, breaks, half days, and important dates from September 2025 through June 2026.
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | September 4, 2025 (Thu) | School Opens |
| 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 26–28, 2025 (Wed–Fri) | No School |
| Holiday Recess | Dec 24, 2025 – Jan 2, 2026 | No School |
| Martin Luther King Jr. Day | January 19, 2026 (Mon) | No School |
| 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 (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 Half Hollow Hills Central School District 2025-2026 school year serves roughly 7,000 students across western Suffolk County. Encompassing affluent areas like Dix Hills and Melville, it is widely considered a top-tier Long Island academic institution.
With two prominent high schools (High School East and High School West), the district is highly competitive in both Ivy League placement and athletics. Consequently, the school calendar is a vital tool for families navigating intense AP testing blocks, rigorous Regents weeks, and major cultural holiday closures like Diwali and Lunar New Year.
For easy reference, use the button at the top of this page to download a free, color-coded printable Half Hollow Hills school calendar for your fridge or desk.
Data Source: Official Half Hollow Hills Central School District calendar publication.
Disclaimer: This website is not affiliated with, endorsed by, or connected to Half Hollow Hills Central School District or the New York State Education Department (NYSED). For the most current and official calendar, please visit www.hhh.k12.ny.us.
Official calendars can still change. Always confirm updates with the district before making plans.
Last updated: March 17, 2026