Saturday, March 25 2017 marks the tenth anniversary of the , the global movement to turn off non-essential lights for one hour for a day as a way of showing commitment to climate change and the environment. Promoted by the World Wide Fund for Nature (WWF), Earth Hour is celebrated around the world, with major landmarks such as Eiffel Tower and Empire State Building turning off the lights for an hour. Here’s what you need to know about Earth Hour 2017:

Earth Hour 2017 date and time

This year, Earth Hour will be celebrated on March 25, and will start at 8:30pm (the event is not celebrated simultaneously across the world, and the lights are turned off at 8:30pm local time). Earth Hour 2017 participants should turn off non-essential lights at their homes for an hour.

To show solidarity for the event and promote it among their friends, participants can choose to switch their , or choose to . Earth Hour-based cover photos for Facebook, Twitter and Google, as well as animated email signature are also available on the official website. You can also download the to promote it in areas around you, or on your website by using the official event banner.

Earth Hour facts you should know

As a global movement, Earth Hour has seen major landmarks and involvement from all centres of power, from governments and monarchs to celebrities. Here are some interesting Earth Hour facts you should keep note of:

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