Village of Northbrook and the Northbrook Park District invite you to celebrate Earth and Arbor Day in Northbrook on Saturday, April 22, from 8:30am-noon. A variety of vendors will feature earth-friendly ideas and concepts for your home or business. The event takes place rain or shine on the Village Green, at the corner of Shermer and Meadow Roads in Downtown Northbrook. Bring the Family! Free. Type: Festival/Special Events.