In September 1969, at a conference in Seattle, Washington, U.S. Senators. Gaylord Nelson had announced that the spring of 1970 would hold a rally across the United States for the defense of the environment. Senator Nelson initially proposed a nationwide environmental protest. On April 22, 1970 it is said nearly 20 million Americans filled the park and auditorium. The first Earth Day also paved the way for the establishment of the United States Environmental Protection Agency (US EPA).

Earth Day is an annual event celebrated on April 22 each year by communities in 192 countries around the world. It began as a movement in the United States since the 1970s that aimed to raise awareness as well as involve public participation in efforts toward the preservation and conservation of the environment.

The theme for Earth Day 2023 – “Invest in Our Planet.” The theme is focused on engaging governments, institutions, businesses, and the more than 1 billion citizens who participate annually in Earth Day to do their part towards sustainable environment.