Earth Hour

On 20 March 2027, Earth Hour – arguably the world’s best-known campaign for climate action – will take place once again. Every year at the end of March, the lights are switched off for one hour at famous landmarks (such as the Empire State Building in New York or the Brandenburg Gate in Berlin), as well as in businesses and private homes.

Earth Hour was launched in 2007 by the WWF and its partners as a symbolic lights-out event in Sydney and is now one of the world’s largest grassroots environmental movements. But Earth Hour goes far beyond the symbolic act of switching off the lights – it has become a catalyst for positive environmental change, which, by harnessing the power of the people and collective action, drives important legislative changes.