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Today is both Earth Day and Good Friday and while no search engines have a special logo for Good Friday, many do for Earth Day.
Google, Yahoo, Bing, AOL, Ask.com and others have special logos for the special day.
Google's logo is animated, so I have attached below a static picture of the logo and a video of me interacting with the logo. As you can see in the video, as I mouse over areas of the logo, I can make Pandas laugh, birds fly, fish swim and so on.
Yahoo has an animated logo only, there does not seem to be a static version of their logo:
Bing has a nice theme for Earth Day:
So does Ask.com:
AOL has a logo:
And we have a theme here too for the day:
I should note, Google only once had an Easter Day logo and it was back in 2000.
For the past year's Earth Day logos see, 2010 Earth Day, 2009, 2008, 2007, 2006, 2005 and 2004.
Forum discussion at Google Blogoscoped Forums, Google Web Search Help.
