For pictures of the 2010 event at Yonge-Dundas Square see my blog post here.
The Earth Hour action will be in Yonge-Dundas Square this year as CityTV hosts Kevin Frankish and Dina Pugliese will usher in darkness with a free concert by Chantal Kreviazuk, Jarvis Church and Justin Nozuka. Lots of buildings have posters displaying their support of Earth Hour - including the Eaton Centre.
While the event begins at 5:30pm the singing will start at approximately 7:30. Here is the schedule from the WWF website.
5:30 pm Street performers and Earth Hour wish collection begins
7:00 pm onwards Official welcome and open remarks from Gerald Butts, President and CEO, WWF-Canada
Justin Nozuka performs
Jarvis Church performs
8:10 pm Earth Hour countdown ceremony begins
8:30 pm Earth Hour starts and Chantal Kreviazuk performs
9:30 pm Closing remarks
For more excitement there will be flame throwers, aerial artists and hip-hop dance crews.