Earth Hour is the world’s biggest switch off event – a moment millions come together for nature, people and the planet.  

Iconic landmarks, millions of homes, businesses and political leaders across the world switch off their lights for an hour at 8:30PM to celebrate our natural world and as a rallying call to protect it.

But more than that, Earth Hour is a movement. People who want to protect and restore our planet come together at events, at home and online.   Join in at home by having an hour without electric lights.

https://www.wwf.org.uk/earthhour