• Woodhaven - 10 a.m. to 1 p.m. - Open House, Oak Ridge, One Forest Park.

• Howard Beach - 10 a.m. - One-hundred volunteers clean Jamaica Bay. Start at 83rd St. & 165th Ave.

• Maspeth - 10 a.m. to 4 p.m. - Maspeth HS Flea Market. Maspeth HS Field, 54-40 74h Street

• Rego Park - 11 a.m. to 2 p.m. - Halloween Family Fun. Rego Center, 61-35 Junction Blvd.

• LIC - 11 a.m. to 3 p.m. - Halloween Harvest Fun. Socrates Sculpture Park, Vernon Blvd. between 30th Dr. and Broadway

• Glendale - 10 a.m. to 3 p.m. - Adopt-A-Pet Day. CB Kueber Realty, 67-13 Myrtle Avenue

• Bayside - Noon to 3 p.m. - Halloween Festival. Free. Fort Totten Park Parade Grounds.

• Ridgewood - 12 to 5 p.m. - Seneca Avenue Stroll. Seneca Ave between Myrtle & Catalpa Avenues

• Woodside - 12 to 2 p.m. 4th Annual "Woofside" Halloween Pet Festival. Windmuller Park, 52nd St. & 39th Dr.

• Woodside - 12 to 5 p.m. - Annual Fall Street Festival of Woodside. Woodside Ave from 59th to 64th Streets

• Maspeth - 3 p.m. - Fall Drama. Martin Luther School, 60-02 Maspeth Ave.

• Jamaica - 4 p.m. - This Old House: A Behind the Scenes Tour. $40. King Manor Museum, 150-03 Jamaica Ave.

• Little Neck - 4 to 7 p.m. - Halloween Haunted House. Queens Farm Museum, 73-50 Little Neck Parkway

• Maspeth - 5 to 9 p.m. - Irish Fest. O'Neill Restaurant, 64-21 53rd Dr.

• Long Island City - 6 p.m. - Solo Movement by Stephen Lichty. $10. Noguchi Museum, 9-01 33rd Rd.

• Bayside - 6:30 p.m. - Haunted Lantern Tour of historic Water Battery. Free. Fort Totten, 422 Weaver Ave.

• Bayside - 7 to 10 p.m. - Haunted Castle. Bayside Historical Society, 208 Totten Ave.

• Long Island City - 8 p.m. - Combinado Argentina de Danza. Free. LaGuardia Performing Arts Center, 31-10 Thomson Ave., Room E-241