Every year at the end of March, Earth Hour has been known for the “lights off” moment, with individuals from around the globe switching off their lights to show symbolic support for the planet and to raise awareness of the environmental issues affecting it. What is Earth Hour Earth Hour, organized by World Wide Fund (WWF), is a global grassroots movement uniting people to take action on environmental issues and protect the planet. Engaging a massive mainstream community, Earth Hour was famously started as a lights out event in Sydney, Australia in 2007. Since then, it has grown to engage millions of supporters globally, inspiring individuals and organizations worldwide to take action for the environment, and driving major legislative changes by harnessing the power of the crowd. As the movement grows, the one-hour lights out event continues to be the symbol of a broader commitment toward nature and our planet. When does Earth Hour take place? The annual Earth Hour lights out event is held worldwide toward the end of March to encourage individuals, households, communities and businesses to turn off their non-essential lights for one hour as a symbol for their commitment to the planet. Earth Hour 2026 - March 28 Earth Hour, the world’s largest grassroots environmental movement, marks its 20th anniversary this year. We are on course to breach by 2030 the 1.5°C global temperature increase limit set by the Paris Climate Agreement, and nature - the source of our very livelihoods and one of our biggest allies against the climate crisis - is also under severe threat, facing alarming and unprecedented rates of loss globally. The next few years are therefore crucial to all our futures - we have to stay under the 1.5°C climate threshold to avoid irreversible damage to our planet, and we need to reverse nature loss by 2030, ending the decade with more nature than we started, not less. To make this happen, individuals, communities, businesses, and governments must all urgently step up their efforts to protect and restore our one shared home. Amidst our increasingly divided and polarized societies, the Biggest Hour for Earth becomes a precious moment of unity, reminding the world that our one shared home needs our help and that we all can - and must - play a part in protecting it. So, how can you contribute? Earth Hour is calling on individuals, communities, and businesses across the world to switch off their lights and Give an hour for Earth, spending 60 minutes doing something - anything - positive for our planet. Whether you’re into food, fitness, the arts, or the outdoors - everyone can Give an hour for Earth by reconnecting with our planet, restoring our planet, learning more about our planet, or inspiring others to care for our planet - all while doing the things you love! Source : Earth Hour website