Lights at the Kremlin in Moscow was switched off

The stadiums of football teams such as Liverpool, Arsenal and Queens Park Rangers will also be plunged into darkness.

WWF say it’s completely up to individuals how they take part during the hour – just as long as the lights are out!

“It’s not about sitting in the dark for an hour,” WWF says.

“Whether someone is enjoying their favourite book, getting together with friends for a candlelit dinner party or stargazing with loved ones, it’s their event too.”



Earth Hour in Athens as the Acropolis is thrown into darkness

GUM department store in Moscow’s Red Square before and after the lights were turned off during the Earth Hour

The Lujiazui Financial District in Pudong, Shanghai, turned its lights off

Organisers say this year’s theme is a celebration of “Places We Love”, including beaches, forests, reefs, national parks, mountains, rivers and rural areas, which could be at risk from climate change.

The official hashtag for social media posts about activities is #EarthHourUK . People are encouraged to share their #CandleLitSelfie to show how they’ve been celebrating.