Earth Hour is a global movement, which brings millions together across the world to call for greater action on climate change. Each year, hundreds of millions of people around the world switch off their lights and organise events – at home, in their community or in their towns or cities – to show they care about the future of our planet.

Last year nearly 9 million people across the UK took part to send a clear message of support for climate action. From the Sydney Opera House and the Eiffel Tower to Buckingham Palace and Edinburgh Castle, cities, towns and communities like yours across the world switched out their lights and came together for an hour, to join a global show of support for action on climate.