Earth Day

[ urth-dey ]
/ ˈɜrθ ˌdeɪ /
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April 22, a day set aside globally for raising awareness about environmental issues and participating in events to help protect the environment.
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Origin of Earth Day

First recorded in 1970
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What is Earth Day?

Earth Day is a day devoted to celebrating the Earth and raising awareness about and taking action on environmental issues, such as climate change and pollution.

Earth Day is one of the most widely observed international events, with many large environmental organizations holding different events in observance of the day. It often has a different theme each year, though its core mission is the protection of the environment.

Earth Day is sometimes called International Mother Earth Day, which is the name used for the day by the United Nations (though the day precedes the UN’s involvement).

When is Earth Day?

Earth Day takes place every year on April 22.

More information and context on Earth Day

The first Earth Day was observed in the US in 1970. It was organized as a day to hold widespread protests against industrial pollution and environmental destruction with an aim of increasing environmental protections by the government, especially in areas that impact human health. It was inspired by the environmental movement of the 1970s and was in part a specific reaction to the large oil spill that occurred in waters near California in 1969. Early organizers included Senator Gaylord Nelson, Congressman Pete McCloskey, and activist Denis Hayes. It’s estimated that up to 20 million people participated in protests and other activities related to Earth Day during its first year in 1970.

The first Earth Day event and the movement it was established to represent are thought to have contributed to the creation of the US Environmental Protection Agency and laws like the Clean Air Act and Clean Water Act. Earth Day has since become more widely recognized and was first observed internationally in 1990. Today, the mission of Earth Day is largely focused on taking action on the climate crisis.

What are some terms that often get used in discussing Earth Day?

How is Earth Day discussed in real life?

Earth Day is usually observed with events focused on preserving and protecting the planet in big and small ways. It’s also often a day focused on bringing wider awareness to environmental issues like climate change.


Try using Earth Day!

True or False?

Earth Day is always observed on April 22.

How to use Earth Day in a sentence