Message from Yoko Ono regarding Earth Hour 2011:

Dear Friends,
In New York, The Empire State, The Chrysler Building, The UN building and in many of our homes, including my apartment, we all obeyed the EARTH HOUR 8:30 to 9:30 event faithfully.
I am upset that so many large buildings leave their lights on over the weekends still, when the buildings are empty!
As long as we keep doing this event, periodically, it will finally start to sink into the ones who are not too aware now.
That’s how things are done.
With love, yoko

Message from Yoko Ono:

Dear Friends,
Join EARTH HOUR and turn off your lights at 8.30pm local time for one hour on Saturday 26th March.
I will be thinking of all of you when I do it here in my apartment.
Lots of love, yoko

At 8.30pm on Saturday 26 March 2011, Earth Hour will celebrate a worldwide commitment to ongoing change for the betterment of the one thing that unites us all – the planet.

Your journey can start here by signing up and adding your voice to the hundreds of millions across the globe who have already spoken with their actions. Check out the inspiring Earth Hour 2011 video to see what the planet’s voice looks like.

What will you celebrate for Earth Hour 2011?

Earth Hour - Organisers

Earth Hour - Lights Out

Earth Hour - Make a Lantern


Earth Hour started in 2007 in Sydney, Australia when 2.2 million individuals and more than 2,000 businesses turned their lights off for one hour to take a stand against climate change. Only a year later and Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating. Global landmarks such as the Sydney Harbour Bridge, CN Tower in Toronto, Golden Gate Bridge in San Francisco, and Rome’s Colosseum, all stood in darkness, as symbols of hope for a cause that grows more urgent by the hour.

Earth Hour - Chile

In March 2009, hundreds of millions of people took part in the third Earth Hour. Over 4000 cities in 88 countries officially switched off to pledge their support for the planet, making Earth Hour 2009 the world’s largest global climate change initiative.

On Saturday 27 March, Earth Hour 2010 became the biggest Earth Hour ever. A record 128 countries and territories joined the global display of climate action. Iconic buildings and landmarks from Asia Pacific to Europe and Africa to the Americas switched off. People across the world from all walks of life turned off their lights and came together in celebration and contemplation of the one thing we all have in common – our planet.

Earth Hour 2011 will take place on Saturday 26 March at 8.30PM (local time). This Earth Hour we want you to go beyond the hour, so after the lights go back on think about what else you can do to make a difference. Together our actions add up.

So save the date and sign up now.

Earth Hour - Light Writing

Earth Hour by WWF

Earth Hour is organized by WWF. With almost 5 million supporters and a global network in over 100 countries, it’s one of the world’s largest and most respected independent conservation organizations. WWF’s mission is to stop the degradation of the Earth’s natural environment and build a future where people live in harmony with nature.

Earth Hour timeline

Turn back the clock on Earth Hour and discover why, how, where and when it all started.

Why get involved?

Put simply, because our future depends on it!

Earth Hour - Lima Group

Earth Hour has done a lot to raise awareness of sustainability issues. But there’s more to it than switching off lights for one hour once a year. It’s all about giving people a voice and working together to create a better future for our planet.