After a two-year hiatus due to the COVID-19 pandemic, the St. Louis Earth Day Festival returns to the Muny Grounds in Forest Park. Organized by the local nonprofit earthday365, the festival will take place from 11 a.m. to 5 p.m. on both April 23 and April 24. The free event aims to educate and empower the regional community for greater action toward a more sustainable future.