Dress up as your favorite animal or come as you are, but don't miss it! The 2026 Earth Day Festival in Brunswick will bring together community members of all ages in the midcoast Maine region to celebrate Earth and explore practical ways to protect our environment. The Earth Day Festival in Brunswick is being held on the first Saturday after April 22, the day the first Earth Day was organized in 1970. Inspired by the power of that event to mobilize millions of people across political divides to protect our environment, our festival aims to carry on the tradition of building community and inspiring effective action for a sustainable future.