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World Wildlife FundAction Center

Golden Gate Bridge without lights © John Storey / WWF-US

Earth Hour

Saturday, March 28 at 8:30 to 9:30 PM local time

Join hundreds of millions of people around the world and turn off your lights for one hour to show your commitment to climate change action now. It's time we speak up and demand a better future for our planet.

people have signed up so far. Will you join them?

Tell your friends

Earth Hour 2015 is on its way to becoming the largest display for climate change action ever. With your help, we can get everyone to join us. Tell us what you are doing for Earth Hour on or simply post on Facebook, Twitter and Instagram using #EarthHour and @world_wildlife.


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