10 am – noon AMSEAS Beach Walk & Cleanup at Hallock State Park Animals Community Hallock State Park PreserveRiverhead
10 am – noon AMSEAS Beach Walk & Cleanup at Hallock State Park Environment Free Hallock State Park PreserveRiverhead
10 am – 6 pm Sunrise Hi Railers Train Display at The Shoppes Free The Shoppes at East WindWading River
10 am – 4 pm St. William the Abbot School Christmas Fair Christmas Community St. William the Abbot RC Church & SchoolSeaford
11 am – 4 pm Secret Sirens Ages: 5 and upArt Family Free The Whaling Museum & Education CenterCold Spring Harbor
11 am – 4 pm Port Holiday Giving Magic Ages: AllChristmas Family Free Port Holiday MagicPort Washington
1 – 3 pm Meet & Greet with Long Island Romance Author L.S. Case Books & Readings Free Tiny Raccoon BooksSayville
3 – 6 pm Tesla Science Center Holiday Lighting Ages: AllChristmas Community Family Tesla Science Center at WardenclyffeShoreham
4 – 8 pm Holiday Tree Lighting with Santa Ages: AllChristmas Family Free The Shoppes at East WindWading River
4 – 9 pm Mineola Village Holiday Festival Ages: AllChristmas Family Festivals Mineola Memorial ParkMineola
4 – 8 pm Holiday Tree Lighting with Santa at The Shoppes Ages: AllChristmas Family Festivals The Shoppes at East WindWading River
4 – 5 pm Town of Islip’s Santa Comes to Town Parade Ages: AllChristmas Family Free Islip Main StreetIslip
5:30 pm Tree Lighting Ceremony Ages: AllChristmas Family Free Cold Spring Harbor Fish Hatchery & AquariumCold Spring Harbor
10 am – 6 pm Sunrise Hi Railers Train Display at The Shoppes Free The Shoppes at East WindWading River
10 am – 4 pm St. William the Abbot School Christmas Fair Christmas Community St. William the Abbot RC Church & SchoolSeaford
11 am – 4 pm Secret Sirens Ages: 5 and upArt Family Free The Whaling Museum & Education CenterCold Spring Harbor
Noon – 6 pm 45th Annual Holiday Festival Ages: AllChristmas Family Festivals Stony Brook Village CenterStony Brook
3:30 – 5 pm Baldwin Tree Lighting Ages: AllChristmas Family Free Baldwin Historical Society & MuseumBaldwin
4 – 9 pm Mineola Village Holiday Festival Ages: AllChristmas Family Festivals Mineola Memorial ParkMineola
6:30 pm Village of Williston Park Christmas Tree Lighting Ceremony Ages: AllChristmas Community Family Williston Park Village HallWilliston Park
5:30 am – 7:30 pm Town of Islip Holiday Drive-Thru Light Show Ages: AllFamily Free Holiday Brookwood HallIslip
5:30 am – 7:30 pm Town of Islip Holiday Drive-Thru Light Show Ages: AllFamily Free Holiday Brookwood HallIslip
11 am – 4 pm Secret Sirens Ages: 5 and upArt Family Free The Whaling Museum & Education CenterCold Spring Harbor