For the 12th year running, Culper Spy Day brings Long Island’s Revolutionary War espionage history to life. Explore the true story of the Culper Spy Ring — the covert network that helped George Washington turn the tide of the war — through interactive exhibits, activities, and family-friendly programming. Co-hosted with the Three Village Historical Society, this beloved annual event is free and open to all.

When: Saturday, October 3, 2026 · 12:00 PM – 5:00 PM
Where: Long Island Museum, 1200 NY-25A, Stony Brook, NY
Cost: FREE
Note: 12th Annual event. Co-hosted with Three Village Historical Society. Also features a lecture by Bill Bleyer on “Long Island During the American Revolution” from 1:00–2:30 PM (separate registration here).