Earth Hour is a global event organized by WWF (World Wide Fund for Nature, also known as World Wildlife Fund) and is held on the last Saturday of March annually, asking households and businesses to turn off their non-essential lights and other electrical appliances for one hour to raise awareness towards the need to take action on climate change.
Earth Hour 2011 will take place on March 26, 2011 from 8:30 pm. to 9:30 p.m., at participants' respective local time.
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