Earth Hour 2025: What's it all about?

Earth Hour is happening at 8.30pm on Saturday 22 March 2025.

The global event takes place every year to encourage people to turn off their lights for 60 minutes to raise awareness about big issues affecting the environment.

The night will also see some of the world's most famous buildings plunged into darkness for one hour.

This year lots of big landmarks in the UK will be switching off their lights to mark the event including The London Eye, Buckingham Palace and the Palace of Westminster in London, the Liver Building in Liverpool and Stirling Castle in Stirling.

Why is Earth Hour important?

Famous landmarks from around the world turn their lights off during Earth Hour

Earth Hour was started by the World Wildlife Fund (WWF) back in 2007.

The charity wanted to highlight the importance of tackling climate change and protecting nature, issues which many people all around the world care strongly about.

On 31 March 2007, more than 2.2 million people and 2,000 businesses in Sydney, Australia switched off their lights for one hour, which marked the beginning of the movement.

Today, more than 190 countries take part in switch-off events and activities to show their support for the natural world around them.

How are people taking part?

Lots of people will be switching off their lights on 22nd March

You can get involved with Earth Hour by switching off the lights in your home for one hour on the day.

There are also other ways to get involved either at home or your local community.

Why not spend some time outside enjoying the incredible sights and sounds of nature, switch off your devices like phones and gaming consoles for an hour, or spend some time hanging out with friends and family.