Awareness Environment
Earth Hour
A global lights-off hour at 8.30pm local time on a Saturday in late March, held on 28 March 2026 and 20 March 2027.
- UK
- USA
- International
OrganiserWWF
ListingAdded by us from official sources
Last checked19 October 2026
First held2007
About the day
Earth Hour is organised by WWF, with WWF-UK leading in Britain. People, landmarks and businesses switch off lights for an hour to show support for nature and climate action. The first switch-off took place in 2007.
Dates for the next three years
| Year | Date | Where | Status |
|---|---|---|---|
| 2027 | Saturday 20 March 2027 | UK, USA, International | Confirmed by the organiser |
Where this information comes from
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