Today, the third-day in a row, Google has a happy holidays logo, this one is more wintery and snowy, with a winter cabin look. But today is not Christmas, it is the day after Christmas. Why not go colorful and go Kwanzaa, since today is Kwanzaa?
Here is the Google Happy Holidays logo on day three:
Here was day two:
Here was day one:
Of course, if you search for Kwanzaa in Google, you will get this special theme:
So there is the third Google Happy Holidays logo. There doesn't look like there will be a fourth one in the series.
Forum discussion at Google Web Search Help.