2009 (MMIX) was a common year of the Gregorian calendar that started on a Thursday.
January 27
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The DVD, Spongicus, was released.
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February 4
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Lux Interior died.
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February 16
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Shuffleboarding and Slide Whistle Stooges premiered.
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February 17
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Cephalopod Lodge premiered.
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February 18
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Grandpappy the Pirate premiered.
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February 19
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Professor Squidward premiered.
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February 24
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SpongeBob vs. The Big One: Beach Party Cook-Off, SpongeBob's Greatest Hits, and Good Ideas... and Other Disasters were released.
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March 3
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SpongeBob vs. The Big One was released.
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March 10
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Surf's Up SpongeBob! was released.
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March 16
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Sand Castles in the Sand" premiered.
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March 17
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Toy Store of Doom premiered.
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March 18
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Pets or Pests premiered.
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March 19
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Komputer Overload premiered.
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March 20
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Choir Boys" premiered.
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April 17
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SpongeBob SquarePants vs. The Big One premiered.
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April 22
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SpongeBob & You Save the Big Blue, Educate and Activate, Educate and Activate 2, Separation Anxiety, Surfing Dreams, and SpongeBoard premiered.
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May 25
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SpongeBob StarPants was released.
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June 1
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Shell Shocked premiered.
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June 2
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Pineapple Fever premiered.
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June 3
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Single Cell Anniversary premiered.
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June 4
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Squid's Visit premiered.
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June 5
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Gullible Pants premiered.
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June 9
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SpongeBob RoundPants and 10 Happiest Moments were released.
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July 17
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To SquarePants or Not to SquarePants premiered. The Ultimate SpongeBob Sponge Bash began.
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July 18
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Chum Caverns premiered.
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July 19
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The Ultimate SpongeBob Sponge Bash ended. Goo Goo Gas, No Hat for Pat, I Heart Dancing, Someone's in the Kitchen with Sandy, Chum Bucket Supreme, Growth Spout, Tentacle Vision, The Inside Job, Stuck in the Wringer and Overbooked premiered.
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July 21
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The DVD, To SquarePants or Not to SquarePants, was released.
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September 3
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Comic Crazy! was released.
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September 8
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The Great Escape was released. Walking Small and Squilliam Returns premiered in the Republic of Cyberia.
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September 22
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The First 100 Episodes was released.
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October 12
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SpongeBob Diner Dash was released.
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October 24
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The Curse of Bikini Bottom premiered.
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October 26
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The game, SpongeBob's Truth or Square was released in North America.
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November 6
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Truth or Square premiered.
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November 10
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the DVD, SpongeBob's Truth or Square was released.
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November 27
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Greasy Buffoons and Model Sponge premiered.
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December 8
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Balloons, Juice Man, Traffic, and The Outfit premiered. Season 6 Volume 1.
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