Earth Hour is a global environmental initiative in partnership with WWF. Individuals, businesses, governments and communities are invited to turn off their lights for an hour on Saturday, March 24, 2017 at 8:30 p.m. to show their support for the environmentally sustainable action.
As one of the first campaigns on climate change, Earth Hour has grown from a symbolic event in a single city to the world’s largest environmental movement.
Earth Hour in 2017 reached 180 countries and territories, more than 9000 cities and towns. In Portugal, 140 municipalities joined and hundreds of emblematic national monuments were left in the dark, such as the 25 de Abril Bridge, the Jeronimos Monastery and the Cristo Rei, in Lisbon.
In 2018, Earth Hour plans to harness the power of its millions of supporters around the world to change the course of climate change.