Earth Hour 2023: The Biggest Hour for Earth

· Earth Hour, the world’s largest grassroots movement for the environment, returns in 2023 to raise awareness and inspire collective action against climate change and nature loss.

· Over 190 countries and territories will participate in the event on Saturday, March 25 from 8:30-9:30 pm local time.

· Major US landmarks including the Empire State Building, the Space Needle, The Venetian® Resort Las Vegas, and the Willis Tower will all go dark for one hour.

Each year, millions of people across the world count down to Earth Hour and take one iconic action: switching off the lights. The hour of darkness pulls us out of the busyness of our daily routines and allows us to reflect on the one home we all share. In the face of accelerating biodiversity loss and climate change, there has never been a more crucial time to come together and take action for our collective future.

Earth Hour was first launched in 2007 by WWF and partners in Sydney, Australia, and it has since grown into the largest global grassroots movement for the environment. This year, participants are encouraged to go beyond the symbolic lights-out action by learning about, reconnecting with, and helping restore our environment. Read up on biodiversity loss, spend some quiet time in nature, pick up litter, or plant native trees–there are so many ways to celebrate Earth Hour.

“For 16 years, Earth Hour has engaged millions of people the world over with a simple ask to switch off their lights for 60 minutes. But its meaning has become so much more than that,” said Chris Conner, vice president of media and external affairs. “Nature needs us. People need us. Our climate needs us. Earth Hour is an opportunity for us all to come together, not only to celebrate everything our planet provides us, but also to protect it.”

For more information, visit

# # #

For more information, please contact:

[email protected]


Link to social media content here.

Link to last year’s Earth Hour photos here.

About Earth Hour

Earth Hour is WWF's flagship global environmental movement. Over the past 16 years, it has grown to become the world's largest grassroots movement for the environment, inspiring individuals, communities, businesses and organizations in more than 190 countries and territories to take action for our collective future.

Historically, Earth Hour has focused on the climate crisis, but more recently, Earth Hour has strived to address a range of concerns facing people and the planet. The movement recognizes the role of individuals in creating solutions to the planet’s most pressing environmental challenges and demonstrates the power of millions of people working together towards a common goal.

About World Wildlife Fund (WWF)

WWF is one of the world’s leading conservation organizations, working for 60 years in nearly 100 countries to help people and nature thrive. With the support of 1.3 million members in the United States and more than 5 million members worldwide, WWF is dedicated to delivering science-based solutions to preserve the diversity and abundance of life on Earth, halt the degradation of the environment, and combat the climate crisis. Visit to learn more; follow @WWFNews on Twitter to keep up with the latest conservation news; and sign up for our newsletter and news alerts here.