Earth Hour is today from 20:30 – 21:30 (or 8:30 pm to 9:30 pm for those not on the 24 hour clock).
How will you spend it?
Although, I do find it a bit odd that they suggest on their front page that people upload things to the internet during Earth Hour. Doesn’t that sort of defeat the purpose to turning things off? (After a bit of digging around, I found someone else already made the same connection.)
I think the ideal way to spend Earth Hour would be to have a Block Party. Get to know your neighbors and spread the word. 2 birds, 1 stone.