Official Islip 2025-2026 school calendar with holidays, breaks, PDF, and calendar sync. Complete school year calendar for Islip UFSD, Suffolk County. Includes all holidays, breaks, half days, and important dates from September 2025 through June 2026. Dates are manually collected and screened from district-published calendar materials. Printable PDF and Google/Apple Calendar sync options are available below. Updated March 17, 2026.
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | September 2, 2025 (Tue) | School Opens |
| Rosh Hashanah | September 23, 2025 - September 24, 2025 | No School |
| Yom Kippur | October 2, 2025 (Thu) | No School |
| Columbus Day / District Closed | October 13, 2025 (Mon) | No School |
| Election Day | November 4, 2025 (Tue) | No School |
| Veterans Day / District Closed | November 11, 2025 (Tue) | No School |
| District Closed - Thanksgiving Recess | November 26, 2025 - November 28, 2025 | No School |
| District Closed - Winter Recess | December 24, 2025 - January 2, 2026 | No School |
| Martin Luther King Jr. Day / District Closed | January 19, 2026 (Mon) | No School |
| Midwinter Recess | February 16, 2026 - February 20, 2026 | No School |
| Spring Recess | March 30, 2026 - April 10, 2026 | No School |
| Memorial Day / District Closed | May 25, 2026 (Mon) | No School |
| Juneteenth | June 19, 2026 (Fri) | No School |
| Last Day of School | June 26, 2026 (Fri) | School Closes |
View the full 2025-2026 school year by month.
Islip Union Free School District is listed here with official 2025-2026 calendar data. The student year starts on Tuesday, September 2, 2025 and ends on Friday, June 26, 2026.
The main multi-day closure blocks are Rosh Hashanah / Schools Closed (Tuesday, September 23, 2025 through Wednesday, September 24, 2025), District Closed - Thanksgiving Recess (Wednesday, November 26, 2025 through Friday, November 28, 2025), District Closed - Winter Recess (Wednesday, December 24, 2025 through Friday, January 2, 2026), Schools Closed - Mid-Winter Recess (Monday, February 16, 2026 through Friday, February 20, 2026), Schools Closed - Spring Recess (Monday, March 30, 2026 through Friday, April 10, 2026).
Single-day closures and important calendar items include Yom Kippur / Schools Closed (Thursday, October 2, 2025), Columbus Day / District Closed (Monday, October 13, 2025), No School for Students / Election Day / Superintendent's Conference Day (Tuesday, November 4, 2025), Veterans Day / District Closed (Tuesday, November 11, 2025), All Schools/Grades Emergency Sheltering Drill - Early Dismissal (Monday, December 8, 2025), K-5 Parent-Teacher Conferences - No School for Students in Grades K-5 (Elementary only) (Thursday, December 11, 2025), K-5 Parent-Teacher Conferences - Early Dismissal (Elementary only) (Friday, December 12, 2025), Martin Luther King, Jr. Day / District Closed (Monday, January 19, 2026), plus additional dated items in the table below.
Data source & handling: Official calendar from Islip Union Free School District (islipufsd.org). We manually collect and screen dates from district materials, then organize them into key dates, printable PDF, and calendar sync.
Disclaimer: This site is not affiliated with Islip Union Free School District or NYSED. Official calendars can change - always check islipufsd.org before making plans.
Last updated: March 17, 2026