Earth Day 2025 Usa Events. On april 22nd, 2025, earth day will turn 55, with 192 countries and over one billion people around the globe expected to participate. Join millions worldwide in earth day 2025 activities, attend a local event or plan and register your own.

On april 22nd, 2025, earth day will turn 55, with 192 countries and over one billion people around the globe expected to participate. This is why earth day’s theme for 2025, our power, our planet, is perhaps our most important theme ever.