It’s no longer a surprise, since it happens every year. Google shows a colorful bar above the search results when you search for [Christmas], [Xmas] and other Christmas-related queries. There’s also a special bar for Hanukkah.
You can also check the decorations from 2006, 2007, 2008, 2010, when Google also celebrated Kwanzaa and Festivus, the famous Seinfeld holiday.
{ Thanks, Venkat. }