Earth Day is celebrated on April 22 Internationally. Earth Day is designed to increase awareness and appreciation of this planet inhabited by human beings is the earth. Declared by U.S. Senator Gaylord Nelson in 1970, a lecturer of the environment. This date coincided in the spring in the Northern Hemisphere (Northern Hemisphere) and autumn in the southern hemisphere. United Nations celebrates Earth Day on March 20, announced a peace activist tradition John McConnell in 1969, is a day where the sun was right above the equator is often called the equinoxes in March.