Earth Hour is a worldwide grassroots movement uniting people to protect the planet, and is organised by the World Wildlife Fund for Nature (WWF).
Engaging a massive mainstream community on a broad range of environmental issues, Earth Hour was famously started as a lights-off event in Sydney, Australia in 2007. Since then it has grown to engage more than 7000 cities and towns worldwide.
Earth Hour 2016 will be held today - Saturday 19th March between 8.30pm and 9.30pm in our local time zone. The event is held worldwide 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.
You can read more about Earth Hour here.