Earth Hour

Earth Hour
Observed by	World Wildlife Fund for Nature (WWF)
Type	International, Movement, World Wildlife Fund (WWF)
Significance	Climate change and to save Earth
Celebrations	Mass activations to encourage the public to give an hour for the planet; Switching off national and international monuments and landmarks
Begins	8:30 pm
Ends	9:30 pm
Date	Last or penultimate Saturday of March
2023 date	March 25
2024 date	March 23
2025 date	March 22
2026 date	March 28
Frequency	Annual
Related to	Earth 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.