For the 7th year, the Zion Nature Center will host Z’GreenFest, a festival which celebrates Earth day and Arbor day. The celebration takes place this Sunday from 2 to 5 p.m. at the Zion Nature Center, 690 Beech St. In case of rain, the event will be moved to Zionsville Town Hall. Admission is free and sponsored by the Friends of Zion Nature Center and Boone REMC. For more information and a list of participants, please visit www.ZionNatureCenterFriends.org.