Welcome to Earth Hour. Use your power to change climate change.
We are a non-profit
Earth Hour is a charitable organisation based out of Singapore. Our mission is uniting people to protect the planet. We are an open source movement organised by WWF and volunteer organisations worldwide.
The Lights Off Event
Earth Hour was famously started as a lights-off event in Sydney, Australia in 2007. Since then it has grown to engage more than 162 countries and territories worldwide. Earth Hour 2015 is on 28 March 2015, 8:30 pm.
Going beyond the hour
Earth Hour is more than an event. It is a movement that has achieved massive environmental impact, including legislation changes by harnessing the power of the crowd.