Every year, we countdown together across the globe to celebrate Earth Hour and take one iconic action: switch off the lights.
But it is so much more than that.
It is a symbol of unity. It is a symbol of hope.
It is a symbol of power in collective action for nature.
Behind the hour
Moment to movement
Starting as a symbolic lights out event in Sydney in 2007, Earth Hour is now the world's largest grassroots movement for the environment, inspiring millions of people to take action for our planet and nature.
Run by you
From pushing for environmentally-friendly laws and policies to crowdfunding for a better future, YOU make Earth Hour possible. Coordinated by WWF and other volunteer organisations, Earth Hour’s greatest strength is the power of people.
Protecting life on Earth
As accelerating climate change and staggering biodiversity loss threaten our planet, Earth Hour 2018-2020 endeavours to spark never-before-had conversations on the loss of nature and the urgent need to protect it.