For the 2026–2027 school year, the district serves 2,200 students across 3 schools in Long Island, New York. Classes begin September 8, 2026 and end June 25, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Mount Sinai Union Free School District before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Mount Sinai Union Free School District. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Mount Sinai Union Free School District's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for Mount Sinai Union Free School District MSUFSD.
Sources and Checks
Where these dates come from
How the 2026–2027 Mount Sinai Union Free School District calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Mount Sinai Union Free School District published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against mtsinai.k12.ny.us.
- ✓Board-approved version is used where the district marks one.
- ✓First and last day match the published calendar.
- ✓Breaks and holidays are listed with their full date ranges.
- ✓Teacher / no-school days are included where the district lists them.
- ✓Changes happen. Districts amend calendars mid-year — confirm with Mount Sinai Union Free School District before booking around a date.
Common Questions
Frequently Asked Questions
Mount Sinai Union Free School District Calendar 2026–2027 — important dates and answers.
The first day of school for students is September 8, 2026.
Spring break occurs in two parts: March 26 & 29, 2027 (Easter Recess) and April 19-23, 2027 (Passover Recess).
Christmas break is part of the winter recess from December 24, 2026 through January 1, 2027.
Winter recess is scheduled from December 24, 2026 to January 1, 2027.
Thanksgiving recess is from November 25 to November 27, 2026.
The last day of school is June 25, 2027.
Superintendent’s Conference Days are September 2-3, 2026, November 3, 2026, and March 9, 2027.
Mid-Winter Recess is scheduled from February 15 to February 19, 2027.
Labor Day is observed on September 7, 2026, and schools are closed.
Memorial Day is on May 31, 2027, and schools are closed.
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Other New York school district calendars — recently added or updated.