‘The Biggest Hour for Earth’ is a global movement that brings millions of people together to support the planet. Originally known for its symbolic “lights off” moment, the campaign now encourages individuals, communities, and businesses to go beyond switching off and spend one hour doing something positive for the Earth—from learning and connecting with nature to taking action that helps protect it.
Taking place across more than 190 countries, Earth Hour highlights the urgent challenges of climate change and nature loss while inspiring collective action and unity. By giving just 60 minutes, participants contribute to a powerful global effort to create a more sustainable future.