When is Google's birthday? Search engine celebrates 18th birthday with a doodle - but there's something wrong

Google put out a special doodle today to mark is 18th birthday.
The animated Google doodle , designed by Gerben Steenks, depicts the letter "G" as a balloon modeller, wearing a party hat and surrounded by confetti and streamers.
The G blows up a long balloon and twists it into the letters "oogle", to complete the name of the search engine, before the balloon floats away and pulls the G with it.
The doodle is being displayed on Google's homepage around the world on September 27.
There's just one problem.
While Google has celebrated its birthday on September 27 for the... read more