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Earth Hour

Earth Hour

Annual symbolic environmental event

2 min read

Why this is trending

Interest in “Earth Hour” spiked on Wikipedia on 2026-02-25.

Categorised under Science & Nature, this article fits a familiar pattern. Science and technology topics tend to trend after breakthroughs, space missions, health announcements, or widely shared research findings.

GlyphSignal tracks these patterns daily, turning raw Wikipedia traffic data into a curated feed of what the world is curious about. Every spike tells a story.

2026-01-27Peak: 4562026-02-25
30-day total: 5,071

Key Takeaways

  • Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF).
  • , usually on the last Saturday of March, as a symbol of commitment to the planet.
  • Occasionally, in years when Holy Saturday falls on the last Saturday of March (as in 2024), Earth Hour is held a week earlier.
  • The idea of a large scale switch off was coined and developed in 2006, originally under the working title "The Big Flick".
  • The 2007 Earth Hour was held on March 31 in Sydney, Australia at 7:30pm, local time.

Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF). The event is held annually, encouraging the individuals, communities, and businesses to give an hour for Earth, and additionally marked by landmarks and businesses switching off non-essential electric lights, for one hour from 8:30 to 9:30p.m., usually on the last Saturday of March, as a symbol of commitment to the planet. It was started as a lights-off event in Sydney, New South Wales, Australia, in 2007.

Occasionally, in years when Holy Saturday falls on the last Saturday of March (as in 2024), Earth Hour is held a week earlier.

History of Earth Hour

Conception and start: 2004–2007

In 2004, confronted with scientific findings, WWF Australia met with advertising agency Leo Burnett Sydney to "discuss ideas for engaging Australians on the issue of climate change". The idea of a large scale switch off was coined and developed in 2006, originally under the working title "The Big Flick". WWF Australia presented their concept to Fairfax Media who, along with Sydney Lord Mayor Clover Moore, agreed to back the event. The 2007 Earth Hour was held on March 31 in Sydney, Australia at 7:30pm, local time.

In October 2007, San Francisco ran its own "Lights Out" program inspired by the Sydney Earth Hour. After their successful event in October, the organizers decided to rally behind the Earth Hour being planned for March 2008.

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Content sourced from Wikipedia under CC BY-SA 4.0

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