Just go to Google.com and search for Christmas or Noel (French for Christmas) and your search result page is decorated with Christmas-type graphics. Something like this:
If you search for Hanukkah, the Jewish holiday, the Google search result page is decorated with the visuals of the festival.
Probably just the current festivals are being covered by these festive visuals on the search result pages but this is a good way to engage people of different religions. Hopefully Google will be covering all the major religions of the world.