More than 2,000 cities around world expected to participate in rolling event.
Lights are scheduled to go out at hundreds of popular tourist landmarks and buildings worldwide, including New York, London, Paris, Dubai, Hong Kong, Moscow and Nairobi.
Organized by the World Wildlife Fund and supported by a host of powerful names.
The rolling electric turnoff will take place from 8:30 to 9:30 p.m. local time on March 28, beginning in Fiji and following time zones around the globe.
find out more info - www.earthhour.org