Happy Halloween! For the special day, most of the search engines and portals have special logos or themes on their home pages.
In fact, Google's logo was carved and filmed at Google and that made up what you see as the Google Logo for Halloween in 2011. Note, one of the pumpkins was 1,298 pounds!
Google's Video Halloween Logo:
Google also has a static logo:
Bing Halloween Theme (video step 1):
Bing Halloween Theme (video step 2):
AdSense Forum Halloween Treat:
Google Webmaster Help Forum Halloween Treat:
Our theme here at the Search Engine Roundtable: