Earth Hour Lights Out Day is the last Saturday in March every year.

In March 2018, the "Earth Hour" event was launched by the World Wildlife Fund (WWF). In 2018, the lights-out ceremony was set at 20:30 on March 24.

Individuals, communities, businesses and governments will voluntarily turn off lights for one hour to inspire people's sense of responsibility for protecting the earth and thinking about environmental issues such as climate change.

Extended information:

Social response to Lights Out Day:

In March 2009, an email with the subject line "8:00pm on March 28, 2009" 30-9:30, please turn off the lights for one hour" email circulated on the Internet and was forwarded and passed on by many netizens. On the Chinese Internet, which has 300 million Internet users, activities and discussions related to "Earth Hour" are going on in full swing.

Students from more than 100 colleges and universities across the country also demonstrated their creative ideas to combat climate change that day. Unplugged concerts, stargazing at night, children's graffiti contests, candlelight messages and other activities from individuals, businesses, communities and schools have all brought the Earth Hour event to a climax.

Low Carbon Life China event promotion ambassador Yu Quan promised to offset the carbon emissions of flying performances in the next year by purchasing carbon emissions, and to bring his own tableware to all performances and not use disposable tableware.

Reference: Baidu Encyclopedia-Earth Hour