Toronto was one of the particpating cities. Click here to see a special Toronto Star report on the festivities.
More than 10,000 people listened to Nelly Furtado sing her heart out in the semi-darkness at a free outdoor concert in Nathan Phillips Square.
Me? I had been to a Scottish Country Dance workshop all day, dancing from 9am till 4:30pm. My feet were hurting. I didn't want to go anywhere.
I lit the candles and turned the lights out at 8pm. Outside, the houses across the road were dark. The Space Cadet claimed the sofa, and I settled into a comfy chair to enjoy the candlelight and the quiet.
I woke up at midnight.
Earth Hour was history..... and I slept right through it!