5 – 7 pm Builder’s Club Ages: 5 – 12 Haverstraw King’s Daughters Public Library, Main BranchGarnerville
Various The Great Jack O’ Lantern Blaze: Hudson Valley Ages: AllFestivals Halloween Van Cortlandt ManorCroton-on-Hudson
Various Blue Whale: The World’s Biggest Animal Ages: AllAttractions Liberty Science CenterJersey City
Various Tricks and Treats Ages: AllAnimals Attractions SEALIFE New Jersey at American DreamEast Rutherford
10 – 11 am Farm-to-Fable Ages: 3 – 8Books & Readings Classes Hilltop Hanover Farm & Environmental CenterYorktown Heights
10 am BRICK-or-TREAT: MONSTER PARTY Ages: AllAttractions Halloween LEGOLAND Discovery Center New Jersey at American DreamEast Rutherford
11 am – 5 pm Brick-or-Treat: Monster Party Ages: 3 – 12Attractions Games LEGOLAND Discovery Center WestchesterYonkers
6 – 6:30 pm Music & Movement with Miss Fran Ages: 4 and underFree Haverstraw King’s Daughters Public Library, Main BranchGarnerville
Various The Great Jack O’ Lantern Blaze: Hudson Valley Ages: AllFestivals Halloween Van Cortlandt ManorCroton-on-Hudson
Various Blue Whale: The World’s Biggest Animal Ages: AllAttractions Liberty Science CenterJersey City
Various Tricks and Treats Ages: AllAnimals Attractions SEALIFE New Jersey at American DreamEast Rutherford
10 am – 2 pm Orangetown Museum Exhibition: Creating Community 1950 Ages: 3 and upArt Community The Orangetown Historical Museum & ArchivesOrangeburg
10 am BRICK-or-TREAT: MONSTER PARTY Ages: AllAttractions Halloween LEGOLAND Discovery Center New Jersey at American DreamEast Rutherford
10:30 – 11:15 am Playtime Storytime Ages: 4 and under Haverstraw King’s Daughters Public Library, Main BranchGarnerville
11 am – 6 pm Brick-or-Treat at LEGOLAND® New York Ages: AllAttractions Halloween LEGOLAND New York ResortGoshen
11 am – 5 pm Brick-or-Treat: Monster Party Ages: 3 – 12Attractions Games LEGOLAND Discovery Center WestchesterYonkers
4:30 – 5:15 pm Science in Action @ the Village Branch Ages: 9 – 12Free Haverstraw King’s Daughters Public Library Village BranchHaverstraw
4:30 – 5:30 pm Tot Parade at Chabad of the Rivertowns Ages: AllFestivals Free Chabad of the RivertownsDobbs Ferry
5:45 – 6:15 pm Free Spooktacular Early Childhood Class Ages: 3 – 4Classes Free Eugene’s Music & Learning StudioPort Chester
7 – 10:30 pm The Haunt at Wildcliff Mansion Ages: 9 and upCommunity Halloween Hudson Park Children’s GreenhouseNew Rochelle
7 – 10:30 pm The Haunt at Wildcliff Mansion Ages: 5 and upHalloween Holiday The Haunt at Wildcliff MansionNew Rochelle
Various The Great Jack O’ Lantern Blaze: Hudson Valley Ages: AllFestivals Halloween Van Cortlandt ManorCroton-on-Hudson
Various Blue Whale: The World’s Biggest Animal Ages: AllAttractions Liberty Science CenterJersey City
Various Tricks and Treats Ages: AllAnimals Attractions SEALIFE New Jersey at American DreamEast Rutherford
Tomorrow, 6 pm Music & Movement with Miss Fran Haverstraw King’s Daughters Public Library, Main Branch
Brooklyn Paper Palestinian eatery Ayat will open new outpost in Bushwick, featuring nonprofit café Giving Grounds