Earth Day is a name used for 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 John McConnell in 1969. A second Earth Day, which was founded by
Gaylord Nelson as an environmental teach-in in the late 1960s, is celebrated in many countries each year on
April 22.
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