Complete school year calendar for Williamsville Central School District. 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 |
| Rosh Hashanah | Sep 23, 2025 (Tue) | No School |
| Yom Kippur / Fall Recess | Oct 2, 2025 (Thu) | No School |
| Columbus Day / Indigenous Peoples' Day | Oct 13, 2025 (Mon) | No School |
| Diwali (Supt. Conference Day) | Oct 20, 2025 (Mon) | No School |
| Veterans Day | Nov 11, 2025 (Tue) | No School |
| Thanksgiving Recess | Nov 27–28, 2025 (Thu–Fri) | No School |
| Winter Recess | Dec 22, 2025 – Jan 2, 2026 | No School |
| MLK Day | Jan 19, 2026 (Mon) | No School |
| Mid-Winter Recess | Feb 17–21, 2026 (Mon–Fri) | No School |
| Spring Recess | Apr 3–10, 2026 (Thu–Fri) | No School |
| Eid al-Fitr (Supt. Conference Day) | Mar 20, 2026 (Fri) | No School |
| Memorial Day | May 25, 2026 (Mon) | No School |
| Eid al-Adha (Supt. Conference Day) | May 27, 2026 (Wed) | No School |
| Juneteenth | Jun 19, 2026 (Fri) | No School |
| Last Day of School | June 25, 2026 (Thu) | 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 Williamsville Central School District 2025-2026 school year runs from September 2, 2025 to June 25, 2026. Located in the suburban towns of Amherst and Cheektowaga in Erie County, Williamsville is one of the largest suburban school districts in Western New York, serving approximately 10,000 students across 13 schools.
Williamsville is consistently ranked among the top-performing districts in the Buffalo metropolitan area, known for its strong AP programs, award-winning music and arts departments, and competitive athletics. The district follows the typical WNY schedule with a full week off for Mid-Winter Recess in February and Spring Recess in April. Compare with neighboring Buffalo Public Schools.
The first day of school for Williamsville Central School District is Tuesday, September 2, 2025.
Winter Recess runs from December 22, 2025 through January 2, 2026. Students return on Monday, January 5.
Mid-Winter Recess is February 17–21, 2026 (Presidents' Day week).
Yes. Williamsville observes Rosh Hashanah (September 23, 2025) and Yom Kippur (October 2, 2025) as school holidays.
Spring Recess runs from April 3–10, 2026.
The last day of school is Thursday, June 25, 2026.
Williamsville is a suburban district serving ~10,000 students across 13 schools, while Buffalo is an urban district with ~32,000 students. Both are in Erie County but follow slightly different calendars.
January Regents: January 20–23, 2026 (school in session). June Regents: June 9–10, 17–18, 22–25, 2026.
Yes. Williamsville is one of the most inclusive districts in WNY, observing Diwali (Oct 20), Eid al-Fitr (Mar 20), Eid al-Adha (May 27), Lunar New Year, Rosh Hashanah, and Yom Kippur as Superintendent Conference Days or school holidays.
Data Source: This calendar is based on projected dates derived from historical Williamsville Central School District scheduling patterns.
Disclaimer: This website is not affiliated with, endorsed by, or connected to Williamsville Central School District or the New York State Education Department (NYSED). For the most current and official calendar, please visit www.williamsvillek12.org.
Dates are subject to change. Religious holiday dates are approximate and based on projected lunar calendar calculations.
Last updated: March 12, 2026