INTERNATIONAL DAY

Earth Hour

Earth Hour is a chance to make a real impact on our planet's future.

MAR28

Saturday, March 28Last Saturday in March

Roots: Launched in Sydney, Australia in 2007
Vibe: A global call to action for climate change awareness
Also on Mar 28: Black Forest Cake Day · Respect Your Cat Day · Something on a Stick Day
Hashtag: #EarthHour

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3 ways to celebrate

AT HOME

Lights out hour

Switch off the lights for one hour and enjoy candlelight or stars.

WITH FRIENDS

Candlelit hangout

Gather friends for board games by candlelight with phones off.

AT WORK OR SCHOOL

Pledge changes

Ask coworkers to pledge one energy-saving habit for the month.

Plan ahead

Earth Hour is observed on the last Saturday in March. Here is where it lands for the next ten years, handy for planners, marketers and party people.

2026Sat, Mar 28this year

2027Sat, Mar 27

2028Sat, Mar 25

2029Sat, Mar 31

2030Sat, Mar 30

2031Sat, Mar 29

2032Sat, Mar 27

2033Sat, Mar 26

2034Sat, Mar 25

2035Sat, Mar 31

2036Sat, Mar 29

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Fast facts

Over 190Countries participate annually

Millions of people have taken part since 2007

The story

Earth Hour began in 2007 as a simple idea: to turn off lights for one hour to demonstrate a commitment to the planet. Originating in Sydney, Australia, this grassroots movement quickly gained international traction. Today, it represents a united front in the fight against climate change, inspiring millions to take part globally. Each year, the event serves as a powerful reminder of our collective responsibility toward environmental sustainability.

Read the full story

As the clock strikes 8:30 PM local time, cities around the world plunge into darkness. Iconic landmarks, from the Sydney Opera House to the Golden Gate Bridge, dim their lights, creating an awe-inspiring sight. This moment of solidarity showcases the global dedication to combating climate change. In 2023, Earth Hour reached over 190 countries, with countless individuals sharing their experiences and commitments online.

Participating in Earth Hour is more than just turning off lights; it’s about fostering a deeper connection with our environment. This year, communities are encouraged to engage in local activities, such as candlelight vigils or educational workshops. Many people find that the hour spent in the dark is a time for reflection and inspirationa chance to consider sustainable practices that can be adopted year-round.

As the world continues to face the challenges of climate change, Earth Hour serves as a beacon of hope and action. Individuals are reminded that their choices matter, and collective efforts can lead to significant change. The event encourages ongoing conversations about sustainability and inspires everyone to take steps toward a greener future.

Did you know?

First Earth Hour

The inaugural Earth Hour took place in Sydney on March 31, 2007.

Global Participation

Millions of people have participated in Earth Hour events since its inception.

Landmarks Involved

Famous landmarks like the Eiffel Tower and the Empire State Building join in the lights-out movement.

Annual Themes

Each year, Earth Hour focuses on specific themes related to climate change and sustainability.

Social Media Reach

Earth Hour has a strong presence on social media, with millions of posts shared worldwide.

Corporate Involvement

Many businesses turn off their lights during Earth Hour, showcasing corporate responsibility.

Long-Term Impact

Earth Hour aims to inspire ongoing actions for sustainability beyond the hour itself.

Around the world

Every culture celebrates a little differently.

USUnited StatesCities across the U.S. participate, from New York to Los Angeles, encouraging individuals to join the movement.
AUAustraliaAs the birthplace of Earth Hour, Australia continues to lead with extensive participation and awareness campaigns.
GBUnited KingdomThe UK engages communities with events, emphasizing local actions to combat climate change.
CACanadaCanada's cities actively participate, promoting environmental awareness and sustainable practices.
INIndiaIn India, Earth Hour draws attention to the importance of renewable energy and sustainable development.
DEGermanyGermany focuses on climate action and environmental responsibility, encouraging participation in Earth Hour.