10 am – 7 pm Brick-or-Treat: Monster Party Ages: 3 – 12Attractions Family Games LEGOLAND Discovery Center WestchesterYonkers
10 am – 5 pm Mysteries from the Deep: Exploring Underwater Archaeology Ages: AllAttractions Family Intrepid Museum
10 am – 5 pm Hicks Nurseries 50th Annual Fall Festival Ages: AllFamily Festivals Free Hicks NurseriesWestbury
10:30 am – 3 pm Boo at the Zoo Ages: AllAnimals Attractions Family Trailside Museum and Zoo at Bear Mountain State Park
10:30 am – noon Docent Tours in the Landcraft Garden Environment Outdoors Landcraft Garden FoundationMattituck
10:30 am – 5:30 pm Face Value: Celebrity Press Photography Ages: AllArt Family The Museum of Modern Art
11 am – 3 pm I SPY Halloween Trail Ages: AllAttractions Family Halloween Hudson Highlands Nature Center Outdoor Discovery Campus
11 am – 4 pm Jolly Roger Scavenger Hunt Ages: 3 and upAttractions Family Free The Whaling Museum & Education CenterSuffolk
11 – 11:45 am Inclusive Move & Play (ages 5-10yrs) Classes Project Most Community Learning CenterEast Hampton
11 am – 4 pm New York Aquarium Ascarium Ages: AllAnimals Family Halloween New York AquariumConey Island
11 am Uncle Vlad’s Pumpkin Patch Ages: 3 – 12Attractions Family Halloween Long Island Children’s MuseumGarden City
11 am – 4 pm Homefront to Battlefront: Southampton during World War II Free History & Culture Veterans Memorial HallSouthampton
11 am – 2 pm High Line Halloween: Little Park of Horrors Ages: AllCommunity Family Free The High Line 14th Street Passage
11 am – 2 pm High Line Halloween: Little Park of Horrors Ages: 5 – 8Family Free Halloween The High LineChelsea
11:30 am – 1:30 pm The Grandest Princess Ball Ever at Carmine’s Ages: 8 and underFamily Carmine’s Italian Restaurant – Times SquareTimes Square
Today, 10:30 am Fantastical Realities: Sandra Caplan, Maya Ciarrocchi, and Ray Ciarrocchi Derfner Judaica Museum
Today, 7 pm Bestselling Author James Patterson and Patrick Leddin to Discuss New Book Disrupt Everything — and Win at Manhattan University Manhattan University
Brooklyn Paper ‘Protect the protectors’: Hundreds rally in support of new regulations to protect security guards