Let us all take part in switching off our lights for an hour because at exactly 8.30 PM on Saturday 26th of March 2011, lights will switch off around the globe for Earth Hour. Be involved! Earth Hour has done a lot to raise awareness towards the need to take action on climate change. Earth Hour is not just switching off lights and electrical appliances for one hour once a year. It’s all about giving people a chance to work together in helping and saving our beautiful planet.