Showing definitions for Earth Day

Earth Day

American

[urth dey] / ˈɜrθ ˌdeɪ /

noun

April 22, a day set aside globally for raising awareness about environmental issues and participating in events to help protect the environment.

Etymology

Origin of Earth Day

First recorded in 1970

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

No wonder, then, that Americans planned nationwide Earth Day protests.

From Slate • Apr. 22, 2025

This year marks the 55th anniversary of Earth Day, but rather than enjoying its golden years, the planet is facing a new kind of peril.

From Los Angeles Times • Apr. 22, 2025

Just in time for National Parks Week and Earth Day, no less.

From Slate • Apr. 22, 2025

Earth Day sees various local events take place in addition to the official theme, such as clean-ups of beaches, rivers and other spaces.

From BBC • Apr. 21, 2025

She is a part of the Earth Day Club here in high school, and that is where she meets the boys.

From "The Perks of Being a Wallflower" by Stephen Chbosky

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023