Use your power to change climate change.

Earth Hour 2015 starts in
00
Days
:
00
Hrs
:
00
Mins
:
00
Secs

Uniting people to protect the planet.

The lights-off event

Earth Hour started in 2007 as a lights-off event to raise awareness about climate change. We have grown to engage more than 162 countries and territories worldwide. Earth Hour is on Saturday, 28 March 2015 at 8:30 pm local time.

Learn more about us

Watch our powerful video

This year, everyone's talking climate change. Use #YourPower and take climate action now!

Take Action

We'd love your feedback

Help us plan the movement for our 10th year anniversary in 2016 with this short survey!

Join the movement

Take your first step towards changing climate change. Join millions of people across the world who are part of the Earth Hour movement.

Name*
Country*
Email*

Or join the conversation on