2004

2004 (MMIV) was a leap year of the Gregorian calendar that started on a Thursday. 21 episodes premiered this year.

• January 6 - Fairly Odd Jokes and Timmy Turner's Top-Secret Notebook were released.
• February 3- Superhero Spectacle was released.
• February 6 - Nega-Timmy and Love at First Height initially premiered in Australia.
• February 14 - Love Struck! premiered in Australia, thus ending the Third Season in that country.
• February 16 - The Big Superhero Wish! premiered in the United States.
• February 20 - Vicky Loses Her Icky and Pixies Inc. premiered in the United States.
• March 5 - You Doo and Just Desserts! initially premiered in Australia.
• March 12 - Go Young, West Man! and Birthday Wish! initially premiered in Australia.
• March 19 - Baby Face and Mr. Right! premiered in the United States.
• March 23 - Wish Upon a Mom was released.
• March 26 - Blondas Have More Fun! and Five Days of F.L.A.R.G. initially premiered in Australia.
• April 29 - Fairy Friends & Neighbors! and Just the Two of Us! premiered in Canada.
• May 7 - Jimmy Timmy Power Hour premiered.
• May 11 - Jimmy Timmy Power Hour (DVD and VHS) was released.
• May 18 - ''Power Pals! and Emotion Commotion! premiered in the United States.
• June 1' - 'Lights...Camera...Adam! and A Bad Case Of Diary-Uh! premiered in the United States.
• June 14 - The Odd Couple and Class Clown premiered in the United States.
• June 18 - Who's Your Daddy? an Homewrecker premiered in the United States.
• June 29 - A Mighty Big Wish was released.
• July 2 - Season 5 premieres with the half-hour special "Crash Nebula".
• July 23 - Channel Chasers premiered in the United States.
• August 31 - Too Many Turners was released.
• September 10 - Shelf Life premiered in the United States.
• September 24 - Nicktoons: Freeze Frame Frenzy was released.
• October 5 - Channel Chasers (DVD and VHS) was released.
• October 13 - Nega-Timmy and Love at First Height premiered in Canada.
• October 21 - You Doo and Just Desserts! premiered in Canada.
• November 2 - Go Young, West Man! and Birthday Wish! premiered in Canada.
• November 5 - Timmy's 2-D House of Horror and It's A Wishful Life initially premiered in Australia.
• November 10 - Blondas Have More Fun! and Five Days of F.L.A.R.G. premiered in Canada.
• November 12  - Escape From Unwish Island and The Gland Plan initially premiered in Australia.
• November 15  - Timmy's 2-D House of Horror and It's A Wishful Life premiered in Canada.
• November 27 - Fairy Friends and Neighbors, Just the Two of Us!, New Squid in Town!, and Wish Fixers all premiered in the United States.