Earth Hour is a worldwide movement in support of energy conservation and sustainability, sponsored by the World Wildlife Fund (WWF).
On a Saturday night near the equinox of March, in thousands of cities, individuals, businesses, and famous monuments such as the Eiffel Tower, the Great Wall of China, and the Statue of Liberty go dark for one hour.
Across each continent, this one small act reminds all of us of our enormous impact on planet Earth.
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Click flashlights, light lanterns, and get ready to turn electric lights out to celebrate Earth Hour! Wherever you are, you can help our planet.
Earth Hour Dates
March 27, 2021
March 26, 2022
March 25, 2023
8:30 p.m. local time
Earth Hour Children’s Book & Activities
Earth Hour, by Nanette Heffernan, introduces the global initiative and raises awareness for the importance of energy consumption and conservation.
An Educator’s Guide, co-developed by Nanette Heffernan and Sharon Angal, draws on CCSS – NGSS standards, Nanette’s 15 years experience of working with children and schools on environmental issues, and Sharon’s expertise in teaching science.
The activities encourage students to think critically about the many ways our daily choices impact Earth and its ecosystems and how they can be part of the solution to reverse climate change.
An Activity Kit for students helps them prepare for and celebrate Earth Hour. Fun in the dark ideas include a nocturnal nature walk or glow stick ring toss.
Earth Hour, the FREE Educator’s Guide and the Student Activity Kit are available for download from Charlesbridge Publishing.
World Wildlife Fund: Go Dark For More Than Just the Climate
Go Dark for Wildlife. Rich and varied wildlife is vital to the delicate balance of nature, and by protecting these creatures, we safeguard our magnificent and vulnerable planet.
Go Dark for Rivers. Rivers provide food for hundreds of millions of people worldwide and carry nutrient-rich silt downstream, creating some of the most fertile agricultural lands.
Go Dark for Forests. Forests provide us with food and shelter; help us keep our air and water clean; and keep carbon—a heat-trapping gas that contributes to climate change—out of the atmosphere.
Go Dark for Oceans. Mangrove trees growing in ocean waters along coastlines protect millions of people from storms and coastal erosion and capture and store nearly five times more carbon than tropical forests.
Get more ideas for participation.