7–8pm Seeing the Night Sky Through Timelapse Photography (A Free, Virtual Lecture) Ages: 9 and upArt Community Hamptons Observatory (online)East Hampton
7–8pm Teen Library Council (Gr. 7-12) Ages: 13 and upCommunity Free Finkelstein Memorial LibrarySpring Valley
7pm Movie Nights at the Nature Center on the Great Lawn Ages: 5 – 12Community Film Greenburgh Nature CenterScarsdale
10–11am Back-to-School Family Fun Walk Ages: 5 – 12Classes Community Sheldrake Environmental CenterLarchmont
10am–4pm 18th Annual Old-fashioned Flea Market Ages: AllCommunity Free The Lockwood-Mathews Mansion MuseumNorwalk
10am–4pm Back-to-School Bash at the Hastings Flea Ages: AllCommunity Free Hastings-on-Hudson Metro-North Commuter LotHastings
6:30–7:30pm Teen Makers for a Cause: Dog Toys Ages: 9 and upArt Community Finkelstein Memorial LibrarySpring Valley
Noon–4pm Annual Fall Festival – Bronx Neighborhood Health Ages: AllCommunity Festivals Walter Gladwin ParkBronx
10am–noon Volunteer Cleanup at Sheldrake Ages: 9 and upCommunity Free Sheldrake Environmental CenterLarchmont
2–4pm Opening Reception: “Love Thy Neighbor” exhibiton Ages: AllArt Community Scarsdale Public LibraryScarsdale
7–8pm Teen Library Council (Gr. 7-12) Ages: 13 and upCommunity Free Finkelstein Memorial LibrarySpring Valley
Noon–5pm 40th Annual Bronx Halloween Parade 2025 Ages: AllCommunity Festivals Southern Blvd and Westchester AveBronx
7–8pm Teen Library Council (Gr. 7-12) Ages: 13 and upCommunity Free Finkelstein Memorial LibrarySpring Valley