Earth Hour 2026, set to take place on Saturday, 28 March 2026 at 8:30pm local time, marks a major milestone: the 20th anniversary of one of the world’s largest grassroots environmental campaigns.
In 2007, around 2.2 million Sydneysiders turned off the lights for an hour. [1] This small simple action has grown exponentially into a synchronised global gesture of solidarity. The major landmarks in cities and towns go dark. Countless neighbourhoods switch to candle power as millions of people demonstrate their concern for the planet.
Organised by the World Wide Fund for Nature (WWF), the 2026 theme is the Biggest Hour for Earth. Participants, like you and me, are encouraged not only to switch off non-essential lights for one hour, but also to dedicate sometime toward positive environmental action. We are invited to consciously choose to engage in suitable forms of conservation activities, consider and recommit to sustainable lifestyle changes, to reflect and pray.
Earth Hour continues to represent far more than a symbolic lights-off moment. It serves as a catalyst for raising awareness about the escalating climate and nature crises. The hour of darkness is a prompt for individuals, businesses, and governments to advocate for urgent change. WWF highlights the hour as a moment of global unity – a reminder of both the vulnerability of the planet and the collective power we hold to shape a sustainable future.
Beyond its environmental messaging, Earth Hour stands as a powerful symbol of global solidarity – a moment when millions pause together to acknowledge a shared responsibility for the planet. The simple act of switching off lights becomes a unifying gesture that transcends borders, cultures, and political differences, reminding everyone that climate action is a collective endeavour. This symbolic unity reinforces the message that even small, coordinated actions can build momentum toward meaningful global change.
Every encouragement that you find a way to participate in Earth Hour since, as Pope Leo XIV writes in Dilexi Te, “Our love and our deepest convictions need to be continually cultivated, and we do so through our concrete actions.” (para. 119)
Sr Mary-Ann Casanova PhD
Explore~Embrace~Embody Project Officer
[1] WWF – www.wwf.panda.org/es/?295592/A%2Ddecade%2DEarth%2DHour%2Dmoment%2Dto%2Dmovement