The Harris Center is excited to be joining the Caterpillar Lab, Antioch Bird Club, the Sustainability Project, Monadnock Food Co-op, and nearly 70 other organizations for a day of earth-inspired food, music, learning, and fun at the Monadnock Region Earth Festival. Noon to 4 p.m. at the Monadnock Food Co-op in Keene. Rain date: Sunday, April 22. For more information, visit https://www.facebook.com/events/211599282927941/.