Earth hour - March 29th, 2008 - 8pm -

Those that set aside one hour to reduce their energy consumption, by turning off unneeded lights and any appliances on standby, will be joining in a world wide movement. Following Earth Hour’s success in 2007, where more then 2 million people reduced their energy demand and Sydney’s landmark buildings where left unlit, Earth Hour has grown to cover 24 cities worldwide.

earthhour.org