Earth Hour’s first global replication
Activity · 2007 · Notable
Sydney’s one-hour switch-off became a shared ritual across cities and countries.
Spread Score
How it worksNumbers
- Participating countries
- 35
- 2008 edition · WWF organizer count · Self-reported · WWF Brasil
- Seed to milestone
- 12 months
- Mar 31 ’07 to Mar 29 ’08
- Platforms
- 2
- Started on Open web
- Origin
- Mixed
- Politics & civic
How it spread
Trace the originEarth Hour began in Sydney in March 2007. City governments, news partners and recognizable landmarks helped reproduce the one-hour switch-off abroad. WWF counted 371 participating cities in 35 countries in 2008, followed by 88 countries in 2009.
Documented milestone; not a measured attention peak.
7 more events on this chart
Join free to see themTimeline (10)
March 2007
September 2007
Nate Tyler / Lights Out San Francisco press · Sep 19 ’07
Nate Tyler planned a separate San Francisco switch-off after experiencing Sydney’s event.[6]
January 2008
WWF Canada / Toronto Star / City of Toronto / Virgin Mobile first amplifier · Jan 18 ’08
Toronto’s partners offered newspaper/web promotion, customer texts, a mayoral video and reusable footage.[2]
Spread the same way
New cases, every week
How the next thing spread, the week it does.