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  1. Earth Day: The Official Site | EARTHDAY.ORG

    Apr 2, 2009 · Visit the official Earth Day site to learn about the world's largest environmental movement and what you can do to make every day Earth Day.

  2. Earth Day - Wikipedia

    Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally through …

  3. Earth Day | Definition, Environmentalism, History, & Facts ...

    Earth Day is an annual celebration honoring the achievements of the environmental movement and raising awareness of the importance of long-term ecological sustainability. It is celebrated …

  4. Earth Day: What is it and why does it matter? | Space

    Apr 22, 2025 · Earth Day is a global event held every year on April 22, dedicated to celebrating Earth 's natural beauty and raising awareness about protecting our environment.

  5. Earth Day 2025 - Origins, Theme, Celebration | HISTORY

    Oct 27, 2009 · Earth Day was founded in 1970 as a day of education about environmental issues and the holiday is now a global celebration that’s sometimes extended into Earth Week, a full …

  6. Earth Day: Fact Sheet - Congress.gov

    Apr 11, 2025 · Introduction Earth Day is an annual event to raise awareness about environmental issues. First held on April 22, 1970, it is celebrated each year on April 22. This fact sheet assists …

  7. Today in History - April 22 - Library of Congress

    Earth Day Earth Day was first observed on April 22, 1970, when an estimated 20 million people nationwide attended the inaugural events at tens of thousands of sites including elementary …