The Committee of the Proprietors of the Common and Undivided Lands in New Haven will be celebrating Wake Up the Green Spring Festival on Saturday, May 11 from 10:30-4 p.m on the New Haven Green. The event will mark the start of spring and encourage the citizens of New Haven to get out and enjoy our beautiful city and the New Haven Green! To open the event, a reenactment of Powder House Day is held, taking place at 10:30 AM. To learn more about Powder House Day, read more below.