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About Earth Hour

Switch off and support WWF’s Earth Hour

Saturday 27 March 2010 at 8.30pm, we want a billion people around the world to switch off their lights for one hour – WWF’s Earth Hour. Show you care about climate change.



All about WWF's Earth Hour

Lights out around the world

Watch our short film and find out more about WWF's Earth Hour.

About WWF's Earth Hour


Earth hour success in 2009

Sydney Opera House in the dark for Earth Hour

WWF's Earth Hour 2009 took the world by storm as it travelled east to west and hundreds of millions of people switched off their lights

See the global highlights


We're doing it to tackle climate change

Polar bear

WWF believes there is still time to avoid the worst impacts of climate change. But we need to act now.

Watch our short video about WWF and climate change


What did people do for Earth Hour in 2009?

Harbour bridge

WWF's Earth Hour was embraced by people in over 3,000 cities and towns, nearly 1,000 landmarks, and more than 83 countries around the world. 

See what people did in 2009





Countdown to Earth Hour


Useful links

Earth hour 2010

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