Earth Hour is a worldwide movement for the planet organized by the World Wide Fund for Nature (WWF). Earth Hour engages a massive mainstream community on a broad range of environmental issues.

It was famously 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 worldwide, and the one-hour event continues to remain the key driver of the now larger movement.

The event is held worldwide and held towards the end of March annually, encouraging individuals, communities, households and businesses to turn off their non-essential lights for one hour as a symbol for their commitment to the planet.

Earth Hour 2014 is scheduled for Saturday, March 29, from 8:30 p.m. to 9:30 p.m. during participants' local time.