Earth Hour is a worldwide movement for the planet. The event is held worldwide annually encouraging individuals, communities, households and businesses to turn off their non-essential lights for one hour, from 8:30 to 9:30 p.m.
Earth Hour 2015 was on Saturday, March 28, from 8:30 pm to 9:30 pm in a location's local time. Earth Hour 2016 will be on Saturday, March 19, from 8:30 p.m. to 9:30 p.m