Since our beginnings in 2007, Earth Hour has been known for the symbolic “lights off” in support of our planet.
In March 29 2026, we’ll mark our 20th anniversary, celebrating two decades of collective action and storytelling from communities around the world.
Earth Hour is moment of unity that brings the world together, shines a spotlight on nature loss and the climate crisis, and inspires millions more to act and advocate for urgent change.
Each year, we work together to turn a single Earth Hour into thousands and millions of hours of action for our one shared home.
Earth Hour. The Biggest Hour for Earth. Image adapted from: https://www.earthhour.org/take-part/engage-your-community