Bugger, I missed it. I was watching, on a device which used electricity, Jeremy Clarkson and his friends drive smoky diesel lorries through Burma.
Most entertaining it was, too. Better than turning the lights off, anyway.
I reported on this a few years back when the Environment Minister of British Colmbia lit candles all over his residence and set the cat on fire. That's a carbon pawprint, if you like.
Earth Hour is not for people who are worried about the planet but for people who want to look as if they are. Almost no electricity is saved and it may be that the sudden surge in use at the end of the hour means the event might cause more to be used.
If you think that not using electricity will save the planet, don't use any. You'll be happy. But don't tell us about it. Keep it to yourself.
Virtue is its own reward.