April 22, 2008
Earth Day is either of two different observances, both held annually during spring in the northern hemisphere, and autumn in the southern hemisphere. These are intended to inspire awareness of and appreciation for the Earth’s environment. The United Nations celebrates an Earth Day each year on the March equinox, a tradition which was founded by peace activist John McConnell in 1969. A second Earth Day, which was founded by U.S. politician Gaylord Nelson as an environmental teach-in in the late 1960s, is celebrated in many countries each year on April 22.