Earth Day at Discovery Green is coming on April 25, 2026. Sign up to be an exhibitor.

Sign-up as a volunteer! We need load-in crew members, a load-out team, check-in helpers, and lawn game facilitators to help make Houston’s largest Earth Day a great educational experience for all who attend. Learn more about the jobs and shift times, then sign up to contribute to a memorable celebration of our planet that provides opportunities for individuals to learn how they can fight for its healthy future. Contact earthday@cechouston.org to volunteer.

On April 22, 1970, 20 million people took to the streets and college campuses and hundreds of cities to protest environmental ignorance and demand greater protections for our planet. This first Earth Day sparked the passage of major environmental legislation in the U.S. including the Clean Air, Clean Water, and Endangered Species Acts, and the creation of the Environmental Protection Agency.