Today is Google's 14th birthday, well some would say their birthday was on September 7th, but Google changed their birthday several years ago to be on September 27th.
To celebrate, Google has a basic animated GIF logo on their home page.
The logo has 14 candles on top of a cake. The cake is then eaten but it leaves a pattern of the Google letters so it remains a Google Doodle even after it is eaten. I am sure there is more symbolism here but I don't currently see it.
In all my years covering Google's birthdays, I've never seen such a large number of happy birthday wishes from users in the Google forums. I only listed a few below but there are literally tons and tons of good wishes from users.
History Of Google Birthday Logos:
Google's 13th Birthday Logo:
Google's 12th Birthday Logo:
Google's 11th Birthday Logo:
Google's 10th Birthday Logo:
Google's 9th Birthday Logo:
Google's 8th Birthday Logo:
Google's 7th Birthday Logo:
Google's 6th Birthday Logo:
Google's 5th Birthday Logo:
Google's 4th Birthday Logo:
For the past year birthday logos, see the 13th birthday, 12th birthday, 11th birthday, the 10th also, 9th, 8th, the 7th and 6th. The 7th and 6th were celebrated on different days than the later ones, due to there being confusion on when Google's real birthday is.