In 2009 hundreds of millions of people around the world showed their support by turning off their lights for one hour, Earth Hour. In 2010 Earth Hour will continue to be a global call to action to every individual, every business and every community. A call to stand up, to take responsibility and to get involved in working towards a sustainable future. So turn off your lights for one hour, Earth Hour, 8.30pm, Saturday 27th March 2010.