Earth Hour

Earth Hour
Observed byWorld Wildlife Fund for Nature (WWF)
TypeInternational, Movement, World Wildlife Fund (WWF)
SignificanceClimate change and to save Earth
CelebrationsMass activations to encourage the public to give an hour for the planet; Switching off national and international monuments and landmarks
Begins8:30 pm
Ends9:30 pm
DateLast or penultimate Saturday of March
2023 dateMarch 25
2024 dateMarch 23
2025 dateMarch 22
2026 dateMarch 28
FrequencyAnnual
Related toEarth Day

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 9:30 p.m., usually on the last Saturday of March, as a symbol of commitment to the planet.[1] It was started as a lights-off event in Sydney, 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.

  1. ^ "About Us". Earth Hour. Retrieved March 31, 2014.