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Sunday September 21st – Sun Day day of Action
Sun Day is a day of action on September 21, 2025, celebrating the power of clean energy.
Sun Day is a day of action to celebrate the power of clean energy. On September 21st, people everywhere will be showcasing solar installations, electric homes and vehicles running on clean power. By organizing thousands of events on the fall Equinox, Sun Day will help accelerate the ongoing clean energy revolution: we have the technology and the solutions, all we need is to build the political will to scale-up and accelerate clean energy and make it accessible to all.
The clean energy revolution is here. Solar, wind and batteries are the cheapest form of power on the planet, lowering costs, creating new jobs, and strengthening our communities. But some politicians and industries are trying to hold it back.
On Sep 21, we’ll celebrate the progress we’ve made and push for more. We’ll install new solar, host e-bike parades, give heat pump tours, and rally for change. Together, we’ll make the sun rise on our clean energy future.
Attend a Sun Day event.
Sun Day is our moment to come together for clean power for everyone.
If we can keep building solar power, we’ll have a shot to stop climate change – which is why it’s so important to stand up to the politicians stopping it.
On September 21st, we’ll be coming together to celebrate the power of renewable energy: from cutting the ribbon on new solar parks, to marching for laws to make it easier to benefit from renewables, to ebike parades and more.
We all feel better when the sun comes out, so let’s be the bright light of hope that changes the world. Join us on September 21st.
We’re organizing on September 21st for two big reasons. First, because it’s the solar equinox – one of the two days of the year when all of the world gets an equal amount of sunlight, showing how the sun unites us. Second, September 21st is right before the UN General Assembly’s annual meeting, which means we have an opportunity to send a message to US and world leaders on the urgent need to accelerate and scale-up the just transition to clean energy.
