8 am – 5 pm Long Island Celtic Festival Ages: AllFamily Festivals History & Culture Old Westbury GardensOld Westbury
10 am – 4 pm Sag Harbor Whaling and Historical Museum Holiday History & Culture Sag Harbor Whaling & Historical MuseumSag Harbor
10:30 am – 12:30 pm New Roots Summer Wine Club Event Classes Community Private Home – RSVP for AddressCold Spring Harbor
11 am – 4 pm Pirate Quest Ages: 5 – 12Art Craft & DIY Family The Whaling Museum & Education CenterCold Spring Harbor
1 – 11 pm Port Jefferson Greek Festival Ages: AllAttractions Family Festivals Greek Orthodox Church of the AssumptionPort Jefferson
4 – 11 pm The Feast of Mother Cabrini Ages: AllFamily Festivals Free Suffolk County Community College Grant CampusBrentwood
7:30 – 10 pm Ghost Hunting at the Rogers Mansion History & Culture Nightlife Southampton History MuseumSouthampton
Today, 7 pm The Atelier at Flowerfield offers “Van Gogh in Auvers: 1890”, a FREE online lecture presented by Thomas Germano, Professor of Art and Art History at Farmingdale State College/SUNY on Wednesday, September 18th at 7PM The Atelier at Flowerfield