From time to time, Google introduces humorous or artistic modifications in the company's logo to commemorate holidays, anniversaries or major events. These modified logos are called doodles.
Doodles on the Google homepage have become highly popular, making the search on Google more fun and enjoyable for its users. Over the years, Google Doodles have become increasingly complex, transforming Google's logo into video or making it interactive. More than 10000 googles have been created worldwide, some of them had been only seen in specific countries. You can see the complete doodles collection here.
In this post we selected our favourite 25 Google Doodles for your enjoyment, which ones are yours?

• 50th Anniversary of the First Man in Space - Apr 12, 2011 (Global) - CLICK LINK TO VIEW  
• Freddie Mercury's 65th Birthday - Sep 05, 2011 (Global) - CLICK LINK TO VIEW
• 240th Birthday of Richard Trevithick - Apr 13, 2011 (UK)
• Louis Braille's Birthday - Jan 04, 2006 (Global)
• Agatha Christie's 120th Birthday - Sep 15, 2010 (Selected Countries)
• 100th Birthday of Taro Okamoto - Feb 26, 2011 (Japan)
• 25th Anniversary of Tetris - Jun 06, 2009 (Selected Countries)
• Jules Verne's 183rd Birthday - Feb 08, 2011 (Global) - CLICK LINK TO VIEW
• First Day of School - Sep 01, 2011 (Selected Countries)
• 226th Birthday of John James Audubon - Apr 26, 2011 (Global)
• Coming of Age Day - Jan 10, 2011 (Japan)
• Alfons Mucha's 150th Birthday - Jul 24, 2010 (Selected Countries)
• Les Paul's 96th Birthday - Jun 09, 2011 (Global) - CLICK LINK TO VIEW
• PAC-MAN's 30th Anniversary - May 21, 2010 (Global) - CLICK LINK TO VIEW
• 90th Birthday of Karel Appel - Apr 25, 2011 (Netherlands)
• Antoine de Saint-Exupery's 110th Birthday - Jun 29, 2010 (France, Germany)
• 122nd Birthday of Charlie Chaplin - Apr 16, 2011 (Global) - CLICK LINK TO VIEW
• First Day of Summer. Doodle by Takashi Murakami - Jun 21, 2011 (Global)
• Arthur Boyd's Birthday - Jul 24, 2010 (Australia)
• Google Instant - Particle Logo - Sep 06, 2010 (Global)
• Alexander Calder's 113th Birthday - Jul 22, 2011 (Global)
• 119th Anniversary of the First Documented Ice Cream Sundae - Apr 03, 2011 (Global)
• Jean de la Fontaine's 390th Birthday - Jul 08, 2011 (France)
• 20th Anniversary of the Wallace and Gromit Characters - Nov 04, 2009 (Selected Countries)
• Gregor Mendel's 189th Birthday - Jul 20, 2011 (Global)