Phineas and Ferb All Day Marathon is a marathon of continuous Phineas and Ferb episodes on Disney XD. First broadcast on February 16, 2009, this also marked the start for Season 2 of Phineas and Ferb, which started with the episode "Phineas and Ferb Get Busted". ("Phineas and Ferb Get Busted" was later determined to be a part of Season 1 and is now listed in that season.)
On New Year's Eve of 2011 (Saturday December 31, 2011), Disney XD held another edition of this marathon, running from 11am-12am. The list of episodes was as follows:
- 11:00am- Mommy Can You Hear Me?/Road Trip
- 11:30- Skiddley Whiffers/Tour de Ferb
- 12:00pm- Phineas and Ferb Interrupted/A Real Boy
- 12:30- Bad Hair Day/Meatloaf Surprise
- 1:00- Ferb Latin/Lotsa Latkes
- 1:30- My Fair Goalie
- 2:00- Interview With a Platypus/Tip of the Day
- 2:30- Raging Bully/Lights, Candace, Action!
- 3:00- Phineas and Ferb Get Busted!
- 3:30- Crack That Whip/The Best Lazy Day Ever
- 4:00- Make Play/Candace Gets Busted
- 4:30- Split Personality/Brain Drain
- 5:00- Invasion of the Ferb Snatchers/Ain't No Kiddie Ride
- 5:30- Run, Candace, Run/Last Train to Bustville
- 6:00- It's About Time!
- 6:30- A Hard Day's Knight/I, Brobot
- 7:00- Are You My Mummy?/Flop Starz
- 7:30- The Secret of Success/The Doof Side of the Moon
- 8:00- The Great Indoors/Canderemy
- 8:30- Rollercoaster: The Musical!
- 9:00- The Belly of the Beast/Moon Farm
- 9:30- Ask a Foolish Question/Misperceived Monotreme
- 10:00- Candace Disconnected/Magic Carpet Ride
- 10:30- Phineas' Birthday Clip-O-Rama!
- 11:00- The Chronicles of Meap
- 11:30- Rollercoaster/Candace Loses Her Head