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 runs from September 4, 2025 to June 26, 2026. The district serves approximately 9,200 students across 9 schools in Dix Hills and Melville, western Suffolk County — neighboring Commack and Huntington.
Half Hollow Hills is unique among Long Island districts in having two comprehensive high schools — East and West — creating a distinctive community identity. The district is known for strong AP course offerings, nationally competitive Science Olympiad teams, and a robust music program.
The first day is Thursday, September 4, 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.
Mid-Winter Recess runs February 16–20, 2026, coinciding with Presidents' Day week.
Half Hollow Hills CSD serves approximately 9,200 students across 9 schools in western Suffolk County. The district includes two high schools — High School East and High School West — which creates a unique community dynamic among families.
Yes. Half Hollow Hills is consistently ranked among the top 30 school districts on Long Island, known for strong AP participation rates, competitive athletics, and a wide range of extracurricular activities.
Data Source: This calendar is based on projected dates derived from historical Half Hollow Hills Central School District scheduling patterns.
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.
Dates are subject to change. Religious holiday dates are approximate and based on projected lunar calendar calculations.
Last updated: March 11, 2026