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Earth Hour is an annual environmental event where people around the world turn off their lights and electrical appliances for one hour to raise awareness about climate change and the need for environmental action. The event aims to demonstrate global solidarity on environmental issues and encourage individuals and organizations to take steps toward sustainability.
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Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF). The event is held annually, encouraging the individuals, communities, and businesses to give an hour for Earth, and additionally marked by landmarks and businesses switching off non-essential electric lights, for one hour from 8:30 to 9:30p.m., usually on the last Saturday of March, as a symbol of commitment to the planet. It was started as a lights-off event in Sydney, New South Wales, Australia, in 2007.
Occasionally, in years when Holy Saturday falls on the last Saturday of March (as in 2024), Earth Hour is held a week earlier.