Earth Hour is a global event organized by WWF (World Wide Fund for Nature) and it takes place on the last Saturday of March every year. It gives us a signal that small actions can make a significant impact on climate change. Basically WWF asks individuals and businesses to switch off lights for an hour between 8:30 and 9:30pm on Saturday (March 28).
The event was first held in Sydney, Australia where 2.2 million people and thousands of businesses turned off their lights from 7:30 to 8:30 pm on March 31, 2007. In March 2008, 35 countries with over 50 million people around the world turned off their lights for an hour. This year 250 cities in 74 countries including China and India will participate in the event. So let's work together to reduce energy consumption by turning off the lights for just one hour tomorrow!