Earth Hour

Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF). The event is held annually, encouraging individuals, communities, and businesses to turn off non-essential electric lights, for one hour from 8:30 to 9:30 p.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, Australia, in 2007.

Earth Hour
Observed byWorld Wild Fund for Nature (WWF)
TypeInternational, Movement, World Wildlife Fund (WWF)
CelebrationsLights candle with fire, lights off
Begins8:30 pm
Ends9:30 pm
DateLast Saturday of March (or the penultimate Saturday of March if the last Saturday coincides with Holy Saturday)
2023 dateMarch 25
2024 dateMarch 23
2025 dateMarch 29
2026 dateMarch 28
FrequencyAnnual
Related toClimate change and to save Earth

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

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