Nickelodeon celebrates its 20th anniversary.
This is a list of notable events, premieres, releases, series cancellations and endings, and other business ventures for Nickelodeon in the year 1999.
Events
- Noggin debuts as its own channel.
- Nick GaS debuts as its own channel.
- Henry & June's Nicktoons Summer Jam replaces Nick in the Afternoon as the annual summer weekday afternoon block.
Shows
Series premieres
- February 11 - Maisy premieres on Nick Jr., before it was moved to Noggin in 2001.
- May 1 - SpongeBob SquarePants premieres after the Kids' Choice Awards; it would begin regularly airing on July 17th.
- August 16 - Rocket Power premiers in primetime.
- October 16 - 100 Deeds for Eddie McDowd and The Amanda Show debut on an revamped SNICK, entitled SNICK House.
- November 28 - Little Bill premieres in primetime.
- December 31 - ChalkZone premieres its first episode as part of the Nick New Year's block, but the rest of the first season would be delayed to 2002.
- Acquired shows (premieres)
- January 11 - Franklin
- January 16 - The Brothers Flub, an animated series by SunBrow Animation, starts its run on Sunday mornings.
- February 8 - Kipper premieres on Nick Jr., before it was moved to Noggin in 2001.
- Acquired shows (reruns)
- January 25 - The Jeffersons
- January 30 - The Sports Illustrated for Kids Show
- June 6 - The Phred On Your Head Show
- June 7 - Leave It to Beaver
- July 5 - WKRP in Cincinnati
- September 6 - Ace Ventura: Pet Detective
- October 18 - Maude
Season premieres
- February 6 - The revival of Are You Afraid of the Dark? premieres.
- November 27 - Season 6, what originally was the final season for All That, begins its run.
Series finales
- December 12 - Figure It Out, four seasons
- You're On!, one season
Specials
- The Off-Beats' Valentines
- The Henry & June Show
Programming blocks
- February 20 - Nick GaS ends its run, in preparation for its channel's launch.
- March 27 - Nicktoons TV airs its final broadcast; it would become its own channel in 2002.
- June - Henry & June's Nicktoons Summer Jam debuts, and would continue for the rest of the summer.
- July 7 - Nick Flicks movie block begins.
- September - 101% Whizbang! With Henry and June debuts on weekday afternoons.
- November - U-Pick Fridays
Video games
- February 28 - The Rugrats Movie (Game Boy Color)
- June 29 - Rugrats: Scavenger Hunt
- November 10 - Rugrats: Studio Tour
Albums
- Music from The Adventures of Pete & Pete
- November 15 - The Rugrats Movie Score
Books
- March 1 - Aliens
- May 1 - Summer Vacation
- June 1
- Oh, Brother!
- The Perfect Formula
- Tommy's Last Stand
- July 1 - Cat's Big Night / Dog Behind Bars
- August - CatDog's Big Idea
- September 1
- FranKELstein
- Star-Spangled Babies
- Tricked For Treats!: A Rugrats Halloween
- October 1
- Bonjour, Babies
- November 1
- Chuckie's Big Wish
- Way Off Broadway
- Westward, Whoa!
Home video releases
- January 12
- Blue's Clues: Rhythm and Blue
- Blue's Clues: ABC's and 123's
- Blue's Clues: Back to Basics
- Little Bear: Friends
- March 30
- CatDog: CatDog vs. the Greasers
- CatDog: Together Forever
- The Rugrats Movie
- June 8
- Little Bear: Summertime Tales
- Little Bear: Favorite Tales, Volume 2
- June 22
- Blue's Clues: Blue's Big Treasure Hunt
- Blue's Clues: Big, Blue and Just for You!, Volume 2
- August 3 - Rugrats: Runaway Reptar
- August 24 - Little Bear: Little Goblin Bear
- September 21 - Blue's Clues: Blue's Discoveries
- October 5
- Rugrats: Make Room for Dil
- Rugrats: Volume 5 (Blockbuster exclusive)
- October 12
- Blue's Clues: Blue's Blue's Big Pajama Party
- Blue's Clues: Big, Blue and Just for You! Volume 3
Business
- March 30 - Nickelodeon enters the DVD market with Paramount Home Video's DVD release of The Rugrats Movie
People
- February 10 - Tiffany Espensen is born
- March 21 - Lexi DiBenedetto is born
- May 5 - Jonny Gray is born
- May 25 - Brec Bassinger is born
- September 7 - Cameron Ocasio is born
- September 13 - Zoey Burger is born and resign
- October 15 - Bailee Madison is born
- November 1 - Buddy Handleson is born
- November 11 - Mary Kay Bergman (the original voice of Timmy Turner) dies
Nickelodeon character debuts
- Oh Yeah! Cartoons: Jenny Wakeman, Nora Wakeman, Brad Carbunkle, Tuck Carbunkle, Penny Sanchez, Tootie, Jorgen Von Strangle
- SpongeBob SquarePants: SpongeBob SquarePants, Patrick Star, Squidward Tentacles, Mr. Krabs, Sheldon Plankton, Karen Plankton, Sandy Cheeks, Mrs. Puff, Pearl Krabs, Gary the Snail, Mermaid Man and Barnacle Boy, Bubble Bass
- Rocket Power: Otto Rocket, Sam Dullard, Twister Rodriguez, Reggie Rocket, Tito Makani, Raymundo Rocket
- The Amanda Show: Penelope Taynt, Crazy Courtney
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