First Day of Autumn Fall Equinox-day when night and day are of equal length. September (9/22/08, 9/22/09, 9/23/10, 9/23/11, 9/22/12, 9/22/13, 9/23/14, 9/23/15, 9/22/16, 9/22/17, 9/23/18, 9/23/19, 9/22/20). 1  Autumnal Equinox. 2  Fall Equinox. 3  Earth's Seasons.
Earth Day Flag created by John McConnell. Earth Day is an annual event, celebrated on April 22, on which day events worldwide are held to demonstrate support for environmental protection.hile this April 22 Earth Day was focused on the United States, an organization launched by Denis Hayes, who was the original national coordinator in 1970, took it international in 1990 and organized events in 141 nations.
But the April 22 date for the first Earth Day also stemmed from a much-earlier observance: Arbor Day, which began in Nebraska in 1872. The date of Earth Day, April 22, stems from an earlier observance, Arbor Day. The most common practice on Arbor Day was the planting of trees. Here is Arbor Day at N.Y. Public School #4, 173rd St. & Fulton Ave., New York. Date unknown.