kochi cbse has issued notification to all schools affiliated to it to ensure that students observe earth hour 2013 earth hour 2013 is slated for saturday march 23 from 830 to 930 pm earth hour is a global movement that brings awareness that we care about our planet and can play a part to save it with the growing concerns about global warming and the positive effects that energy conservation can have on this issue the world wide fund for nature also known as world wildlife fund wwf organises earth hour this calls to switch off all lights and electrical devices for an hour on the scheduled day and time the aim is to not only raise awareness about the issue but to also start a worldwide movement where everyone understands that they can make a difference and make a concerted effort to save the environment we all share cbse has asked the schools can share this information with their students and parents community and advise them to be a part of it