<Tr> <Th_colspan="2"> Earth Hour </Th> </Tr> <Tr> <Th> Date </Th> <Td> 24 March 2018, from 8: 30 pm to 9: 30 pm . </Td> </Tr> <P> Earth Hour is a worldwide movement organized by the World Wide Fund for Nature (WWF). The event is held annually encouraging individuals, communities, and businesses to turn off non-essential electric lights for one hour, from 8: 30 to 9: 30 pm on a specific day towards the end of March, as a symbol of commitment to the planet . It was started as a lights - off event in Sydney, Australia, in 2007 . Since then, it has grown to engage more than 7,000 cities and towns across 187 countries and territories . </P> <P> Occasionally, in years when Holy Saturday falls on the last Saturday of March, Earth Hour is moved a week early rather than its traditional date . </P>

When do you turn off the lights on earth day