Earth Day
Earth Day is intended to inspire awareness of and appreciation for the Earth's environment.
Global observance originated by Gaylord Nelson as an environmental teach-in, and since January 1970 also called Earth Day, is celebrated in many countries each year on April 22.
History of Earth Day - Learn all about how Earth Day was started
Organizer's Guide - What can you do to help celebrate Earth Day in your community?
Earth Day 2008 Calendar - Find events in your community