Winter weather has affected blood donations, and Port Jefferson’s John T. Mather Memorial Hospital, located at 75 N. Country Road, will hold a blood drive on Monday, March 7, to help.

According to the hospital, snow caused many blood drives to be canceled; so the community needs donors to help keep cancer and surgery patients, accident and burn victims, anemic patients, newborns and their mothers and AIDS patients alive.

The Mather event — which will run from 6:30 a.m. to 6:30 p.m. in Conference Rooms 3, 4 and 5 — is open to everyone and no appointment is necessary.

Free valet parking is available at the main entrance.

Donors will receive candy, McDonald’s certificates and a gift card to Panera or Target.