Here is a special touch from Google. If it is your birthday today, the Google homepage will display a special birthday doodle for you. Hover over it and you can see Google’s birthday greeting to you.
Maybe I am living in the rock, I did not know about his until today. Actually, I seldom go to the Google homepage because there are so many ways to use Google search.
BTW, Google does not probe on your birth date. You will need to let Google know about your birthday in your own profile , FYI.