March 18, 2017

25 March is Earth Hour

Earth Hour this year is on 25 March, 8:30 pm (your time). Earth Hour was famously started as a lights-off event in Sydney, Australia in 2007. This year marks its 10th anniversary and its growth to engage more than 178 countries and territories across seven continents and aboard the International Space Station.

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.

Join the movement and use your power to change climate change.

Download and pin up the official earth hour poster (PDF)

Information, resources, sign- up opportunities and how to join in conversations on social media can be found on the Earth Hour website

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