Complete school year calendar for Williamsville Central School District. Includes all holidays, breaks, half days, and important dates from September 2026 through June 2027.
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | September 8, 2026 (Tue) | School Opens |
| Yom Kippur (Supt. Conference Day) | September 21, 2026 (Mon) | No School |
| Columbus Day / Indigenous Peoples' Day | October 12, 2026 (Mon) | No School |
| Veterans Day | November 11, 2026 (Wed) | No School |
| Thanksgiving Recess | November 26–27, 2026 (Thu–Fri) | No School |
| Winter Recess | Dec 24, 2026 – Jan 1, 2027 | No School |
| MLK Day | January 18, 2027 (Mon) | No School |
| Mid-Winter Recess | February 15–19, 2027 (Mon–Fri) | No School |
| Good Friday | March 26, 2027 (Fri) | No School |
| Spring Recess | March 26 – April 2, 2027 (Fri–Fri) | No School |
| Eid al-Fitr (Supt. Conference Day) | March 10, 2027 (Wed) | No School |
| Eid al-Adha (Supt. Conference Day) | May 17, 2027 (Mon) | No School |
| Memorial Day | May 31, 2027 (Mon) | No School |
| Juneteenth (observed) | June 18, 2027 (Fri) | No School |
| Last Day of School | June 24, 2027 (Thu) | School Closes |
Complete month-by-month calendar from September 2026 to June 2027. Every day is color-coded so you can see school days, holidays, and breaks at a glance.
The Williamsville Central School District sets the 2026-2027 academic pace for approximately 10,000 students across 13 schools. It is universally recognized as the gold standard for public education in the greater Buffalo-Niagara region.
The Williamsville school calendar is an essential planning document for families balancing high-stakes academics with upstate weather realities. The district routinely confronts intense, localized snowstorms that require the strategic deployment of built-in emergency closure days. In addition to weather planning, the increasingly diverse suburban community has successfully pushed to align the district's religious and cultural holiday closures with the shifting demographics of Western New York, creating a highly inclusive, complex calendar structure.
For easy reference, use the button at the top of this page to download a free, color-coded printable Williamsville school calendar for your fridge or classroom.
Data Source: Approved by the Williamsville Central School District Board of Education on March 24, 2026. Source: go.boarddocs.com
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.
Official calendars can still change. Always confirm updates with the district before making plans.
Last updated: March 27, 2026