thumb|200px|Logo lors de l'anniversaire de [[Léonard de Vinci le 15 avril 2005]]
thumb|200px|Premier Google Doodle, fait en 1999 pour le festival [[Burning Man]]
Les '''Google Doodles''' (''griffonner'' en français) sont des modifications apportées au logo de fêtes nationales, les anniversaires d'illustres personnages ou autres événements tels les Jeux olympiques. Suivant l'événement, les Google Doodles sont visibles simultanément dans un grand nombre de pays, d'autres sont créés pour un pays en particulier. Ils sont visibles une journée sur les pages du moteur de recherche. 

Le premier des Google Doodles fut dessiné en 1999 pour le festival Burning Man : les fondateurs de Google voulaient signaler leur présence à ce festival en intégrant une silhouette en flamme dans le logo (logo Google de l'époque). La tradition a continué jusqu'à aujourd'hui, avec plus de 200 logos réalisés. La majorité d'entre eux ont été réalisés par Dennis Hwang, mais quelques autres ont été créés par d'autres artistes tel que Scott Adams lors de la semaine spéciale Dilbert du 20 au 24 mai 2002.

1 avril leur logo reprenait les couleurs de Google et un poisson d'avril y était accroché.

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thumb|right|200px|August [[1999–present]]
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<!-- Deleted image removed: thumb|right|200px| [[September 26, 1998 -October 28, 1998]] -->

Olympics. These special logos, designed by Dennis Hwang, have become known as '''Google Doodles'''. 

==History of the Google logo==
In 1998 Sergey Brin created a computerized version of the Google letters using the free graphics program GIMP after teaching himself how to use it. The exclamation mark was added, mimicking the Yahoo! logo.<ref>{{cite book
  | last =Vise
  | first =David
  | authorlink =
  | coauthors =Mark Malseed
  | title =The Google Story
  | publisher =Bantam Dell
  | date =November 2005
  | location =New York
  | pages =43
  | url =
  | doi =
  | id =  
  | isbn =978-0-553-80457-7 }}</ref>

==Google Doodle==
The first Google Doodle was a reference to the Burning Man Festival of 1998.  The doodle was designed by Larry Page and Sergey Brin to notify users of their absence in case the servers crashed.  Subsequent Google Doodles were designed by an outside contractor, until Larry and Sergey asked then-intern Dennis Hwang to design a logo for Bastille Day in 2000.  Hwang has been designing the Google Doodles ever since. <ref>Hwang, Dennis. "[http://googleblog.blogspot.com/2004/06/oodles-of-doodles.html Oodles of Doodles]." ''Google (corporate blog).'' June 8, 2004. Retrieved on July 19, 2006.</ref>  

Clicking on a Google Doodle links to a string of Google search results about the topic, which can drive a lot of traffic to unsuspecting sites.<ref name="hwangcnn">Williams, David E. "[http://www.cnn.com/2006/TECH/internet/07/19/google.logo/index.html Google's unknown artist has huge following]." ''CNN.'' July 19, 2006. Retrieved on July 19, 2006.</ref>

Google doodles have been produced for the Matilda. The celebration of historical events is another common topic of Google Doodles including a jokes. 

On February 14 2007, Valentine's Day, the Google doodle featured a chocolate-dipped strawberry that combined the second "g" and the "l" as its green stem,<ref>Google logos [http://www.google.com/logos/valentine07.gif ''Valentine's Day logo'']. February 14, 2007. Retrieved on April 6, 2007.</ref> giving the appearance that the "l" was missing: thereby displaying "Googe". In response to several speculations the Official Google Blog,<ref>Official Google Blog [http://googleblog.blogspot.com/2007/02/strawberries-are-red-stems-are-green.html Strawberries are red, stems are green.]</ref> responded: "When you look at the logo, you may worry that we forgot our name overnight, skipped a letter, or have decided that 'Googe' has a better ring to it. None of the above. I just know that those with true romance and poetry in their soul will see the subtlety immediately. And if you're feeling grouchy today, may I suggest eating a strawberry."

Google was criticized in patriotic holidays such as Memorial Day and Veterans Day.<ref>[http://www.latimes.com/business/la-fi-google9oct09,0,2321354.story?coll=la-home-center Tweaks send Google critics into orbit (By Jim Puzzanghera, Los Angeles Times Staff Writer)October 9, 2007]</ref> That year, Google featured a logo commemorating Veterans Day.<ref>[http://www.google.com/holidaylogos07.html More Google: Holiday Logos]</ref>

===Doodle4Google competitions===