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⚠Unofficial calendar. Always confirm with your district before making plans. Some dates are estimated from nearby districts or past years — those are marked below.
Williamson Central School District
New York · 1,000 students · 2026–27 school year
Showing the 2026–27 school year. Past years & forecasts are in our API.
Winter
Dec 21 – Jan 1
Spring
Mar 15 – Mar 19
Last day
May 27
Breaks & no-school days
Day off
Starts
Ends
Administrative Day (All Teachers Return)
—
Labor Day (System Closed)
—
Columbus Day; Parent/Teacher Conference Day (Flex)
—
District-Wide/Site-Based Professional Development Day (Flex)
—
Fall Break
Site-Based Professional Development Day; Election Day
—
Winter Break
Administrative Day – Teacher Prep Day (Flex)
—
Martin Luther King, Jr. Day (System Closed)
—
District-Wide Professional Development Day
—
Mid-Winter Break; Presidents' Day
—
Spring Break
Spring Holiday (System Closed)
—
Administrative Day (All Teachers Report)
—
School dayDay offHalf dayEstimated — not yet confirmed by the district