In the first Earth Hour in 2007, more than 2.2 million people in Sydney, Australia turned off their lights for one hour to show their concern about climate change. Once then, Earth Hour has become a global event, with individuals from around the globe switching off their lights to show symbolic support for the planet and to raise awareness of the environmental issues affecting the Earth. 

Since 2023, Earth Hour has asked people to not only switch off their lights for an hour, but also to pledge an hour of their time to do something for the Earth. Watch this short video to see how an hour can help change the world.

How can you be part of Earth Hour 2025? It’s entirely up to you! Choose any activity that helps you reconnect with nature, restore the planet, learn more about our planet, or inspire others to care for it. Find out more about how you can give an hour for the Earth.

Earth Hour starts on March 22, 2025 at 8.30pm local time.