It's Earth Hour on 28 March 2009. What's that about? It's about showing you care for earth by switch off your lights on that day from 8.30-9.30pm.
Archana has details of it on her slideshow.
For those of you who find it difficult to switch off because of your children, consider taking them to a movie and leave your home in the dark for Earth Day. Get your neighbours to join you too.