Earth Hour, put on by the World Wildlife Fund, is a phenomenon that has taken the the world by storm. Originally founded in Australia, and now in its third year in the U.S., people all across the country are turning off their lights for a designated hour of observance. Leslie Aun, Executive Director of Earth Hour U.S., talks to John and Mike about this year’s Earth Hour, taking place on Saturday, March 27 at 8:30 p.m. in your local timezone. “The purpose is to send a message that the world wants action on our climate, and we need to do things right away to save our planet,” Aun says. She encourages those interested in participating to sign up on the official website and see which people and places are making the commitment.