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 on March 29, 2008 and Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating.
On March 28, 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.
Earth Hour 2010 became the biggest Earth Hour ever reaching 1.3 billion people. On March 27, 2010, a record 128 countries and territories united across the globe making it the largest voluntary action ever witnessed.
Earth Hour 2011 will take place on Saturday, March 26 at 8:30PM (local time). Let's make this the best year yet!
To sign up please visit http://wwf.ca/
