The Winchester Conservation Commission is scheduled to hold its annual Aberjona River cleanup day on May 4. Anyone who would like to take part is asked to come to the conservation table in the Town Hall parking lot, 71 Mount Vernon St., between 9 a.m. and 1 p.m. Volunteers will be directed to a location in need of cleaning. Plastic bags and gloves will be provided. Participants are encouraged to wear clothing that covers their legs and arms. The cleanup will be held rain or shine. For more information, contact the town’s conservation administrator, Elaine Vreeland,at email@example.com or by calling 781-721-7152.