http://blogs.msdn.com/b/see/archive/2010/03/26/bing-to-recognize-earth-hour.aspxOn Saturday, March 27 th from 8:30pm Eastern Daylight Time to 9:30pm Pacific Daylight Ti me, the  Bing homepage will be dark in support of Earth Hour . Created by World Wildlife Fund , Earth Hour asks people to participate and demonstrate their concernen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)