Earth Hour is a worldwide movement organized by the World Wide Fund for Nature (WWF). The event is held 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. towards the end of March, as a symbol for their commitment to the planet.It was started as a lights-off event in Sydney, Australia, in 2007. Since then, it has grown to engage more than 7,000 cities and towns across 172 countries worldwide.
Earth Hour 2016 was on Saturday, March 19, from 8:30 p.m. to 9:30 p.m. during participants' local time.[3] and will be held March 25 in 2017.
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