Earth Hour 2011

The Philippines, which has been an active participant of the Earth Hour, had an early "earth hour" when power supply was accidentally interrupted , plunging Metro Manila and nearby provinces into darkness. Nevertheless, even after power was restored, major buildings, commercial centers and residential areas in Metro Manila and most provinces continued to turn off their lights. While participating channels in the Philippines, ABS-CBN and Cartoon Network halted their transmissions for an hour.
YouTube promoted the Earth Hour by changing its logo, and by adding a switch on/off feature near the title of each video, so that users can change the background color from white to black.
One of the least co-operative areas traditionally has been Alberta; in 2008, Calgary's power consumption went up during Earth Hour. The trend continued in 2011 when Edmonton's power usage also increased. While Calgary's power usage went down in 2011 during the event, electricity officials could not distinguish their readings between normal usage and a conscious attempt to participate.