Every year during Earth Hour, millions of people around the world join together to highlight the urgent need to address climate change. But this year, something is different.

For the first time in the fight against climate change, momentum is on our side. In December, leaders from 196 nations heeded the world’s collective call to act together with urgency to address climate change. We have reached a turning point, but we still need your support to secure a low-carbon world. We know that it will take collective action from everyone—governments, businesses, communities and individuals—to turn the tide and stop the worst effects of a warming world.

Let’s keep the momentum going. On March 19 join the world in a historic lights-out display by turning off all non-essential lights at 8:30 p.m. your local time and recommit to the fight against climate change. Together, we can tackle climate change and create a future where people and nature thrive. Share pictures of your Earth Hour celebration on social media using the hashtags #EarthHour #CHTACAST.