Before there was Earth Day, there was (and still is) Arbor Day. Founded by noted agriculturalist and former U.S. Secretary of Agriculture, Julius Sterling Morton, Arbor Day originated in Nebraska City, Nebraska on April 10, 1872, when an estimated one million trees were planted. The day itself was first observed three years later. In 1885, Arbor Day was named a legal holiday in the state of Nebraska, and April 22nd, Morton's birthday, was selected as the date for its permanent observance. (Source: The Arbor Day Foundation).
The curret national holiday for Arbor Day is celebrated every year on the last Friday in April. Arbor Day is also celebrated throughout the world on different dates.
If you don't have a front/backyard where to plant trees (or yours is already at capacity) but would like to get involved in tree planting & cleaning activities, and you live in the Los Angeles area, check out Guidance Green eco-partner Tree Musketeers, the nation’s first youth environmental organization dedicated, at http://www.treemusketeers.org.
To learn more about Arbor Day, visit The Arbor Day Foundation website at http://www.arborday.org.