Earth Hour 2023’s launch ceremony in Hanoi, March 25, 2023.  (Photo: dangcongsan.vn)

Earth Hour is an annual event launched by the World Wildlife Fund since 2007.

The campaign has positively changed the community’s awareness of the significance and benefits of saving energy, protecting the environment, and coping with climate change.

Each year, Earth Hour delivers a different message, but all have the same meaning to protect the earth and keep it greener.

Vietnam first joined the Earth Hour campaign in 2009.