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

    Apr 2, 2009 · Earth Day is now commemorated every April 22, and organizers of events worldwide raise awareness of environmental threats while celebrating environmental progress.

  2. Earth Day - Wikipedia

    The goal of Earth Day 2014 was to dramatically personalize the massive challenges surrounding global climate change and weave that into both Earth Day 2014 and the five-year countdown to Earth Day …

  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 on either …

  4. When is Earth Day? How it started, Earth Day activity ideas

    Apr 1, 2025 · Earth Day is April 22. Here's what to know about how Earth Day happened and how to celebrate our planet this April.

  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 seven days …

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

    Apr 22, 2025 · 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 …

  7. Earth Day - National Geographic Society

    Earth Day is an annual celebration that honors the achievements of the environmental movement and raises awareness of the need to protect Earth's natural resources for future generations.