Environmentalists will be humming John Lennon's "Imagine" in the dark this Saturday 23 March 2013, in the joiner ritual started in 2007 by the World Wildlife Wrestling Federation or something.
Starting at 8:30 PM wherever you happen to be, joiners are advised to turn off all their electric lights and appliances for one hour.
"Awareness" is the goal, apparently.
I really must remember to turn on all the lights and blare the stereo while running a chainsaw. Or maybe just watch a video. How about "Army of Darkness"?