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Earth Hour 2018

Saturday 24 March – lights out at 8:30pm

WWF’s Earth Hour is the biggest movement to protect our planet.

Hundreds of millions of people around the planet take part in WWF’s Earth Hour every year. Last year around 9 million took part in the UK alone.

People do a wide range of things around the hour to show they care about our planet’s future. Millions choose to mark Earth Hour by going ‘lights out’ for 60 minutes at 8.30pm – a symbolic show of solidarity for the planet.

The world’s biggest landmarks – like Sydney Opera House, the Eiffel Tower, Buckingham Palace, and Edinburgh Castle – switch off lights as a visual display of their commitment too.

Your support for Earth Hour, and for WWF’s work in general, has helped us find solutions for the environmental challenges we face the world over. This includes influencing national climate policies, planting new forests in Uganda, and banning plastic in the Galapagos.

This year, we want to get as many people in the UK to make a promise for the planet as we can.



Learn more about Earth Hour Make your promise

Why you should take part


Planet in Crisis

Right now we’re up against the biggest environmental threats that our generation, or any generation, has ever faced.

Wildlife we love, like elephants, turtles and polar bears, are at risk from the effects of climate change, pollution & over-consumption.

The damage has been shockingly fast. Over the last 25 – 30 years: (Source: WWF-UK Living Planet Report)

  • 80% of freshwater species have declined
  • Over 50% of populations of land species have declined
  • 40% of our forests have disappeared to agricultural land with 15 million trees lost each year just for soy production
  • 1 in 6 of the planet’s species are at risk of extinction from climate change

How we’re helping fix it:

  • Working with international governments to accelerate the shift to a low-carbon economy and drastically reduce emissions from burning fossil fuels like coal, oil & gas
  • Restoring & protecting important habitats
  • Addressing our food systems to ensure we’re farming sustainably, reducing waste and consuming responsibly
  • Helping poorer countries cope with their changing climate
  • Encouraging everyone to make sustainable lifestyle choices such as the energy in their homes, transport options, sustainable diets and more…
Learn more about climate change

How you can take part


Saturday 24 March – lights out at 8:30pm

WWF’s Earth Hour is your chance to be part of global change. Make a personal promise to the planet, and join WWF’s big lights out on 24 March.

Share this page on Twitter and Facebook.

Use #EarthHourUK

Take a look at our 60 things to do in the dark! From dinner by candlelight to stargazing or looking for your local landmark switch off – there are lots of fun things to do when the lights go out.

60 things to do in the dark Make your promise

Earth Hour around the UK

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Make a promise for Earth Hour

Your actions matter! Make a promise for the planet and help us turn small actions into big change.

Will you add your promise to the many promises made already?

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