Started by WWF and partners as a symbolic lights-out event in Sydney in 2007, Earth Hour is now one of the world's largest grassroots movements for the environment, engaging millions of people in more than 180 countries and territories. It has become a catalyst for positive environmental impact, driving major legislative changes by harnessing the power of the people.

Earth Hour's success lies in the power of the people! Become a local champion of a global movement by bringing your community together to celebrate the Hour!


✅ Step 1: Plan your event. Not sure where to start? Check out our dedicated guides and practical tips for organizing an event!

✅ Step 2: Spread the word about your event and Earth Hour! Feel free to use our open-source marketing materials!

✅ Step 3: If you're organizing an event that's open to the public, add your event to our public event directory so others can find it!