300 Million B.C.
- Princess Isabella gets rescued by Phineas and Ferb. ("Doof Dynasty")
- In 1903, Baljeet's great grandfather entered a bicycle race but fell into a tiger pit. ("Tour de Ferb")
- In 1903, the Danville World's Fair is celebrated. ("Steampunx")
- In 1924, Baljeet's grandfather entered a bicycle race and avoided the tiger pit but not the tiger. ("Tour de Ferb")
- Mr. Slushy Dawg was founded in 1929. ("The Bully Code")
- Bucky dies and is replaced by Perry. ("It's About Time!")
- Isabella forms a crush on Phineas.
- Baljeet moves to America.
- Summer vacation comes to Danville. ("Rollercoaster").
- Phineas and Ferb construct the Coolest Coaster Ever ("Rollercoaster").
- Phineas and Ferb make a backyard beach ("Lawn Gnome Beach Party of Terror").
- Phineas and the Ferb-Tones is formed ("Flop Starz").
- Phineas and the Ferb-Tones performs for the last time ("Flop Starz").
- The Swamp Oil 500 race goes on ("The Fast and the Phineas").
- Love Händel reforms ("Dude, We're Getting the Band Back Together").
- Professor Destructicon captured and arrested ("One Good Scare Ought to Do It!").
- Phineas and Ferb decide to do nothing for a day ("The Best Lazy Day Ever").
- Phineas and Ferb get Goldie and make a backyard underwater animal show ("Backyard Aquarium").
- Phineas and Ferb spread public awareness for the aglet. Meanwhile, Doofenshmirtz's high school recording goes viral ("Tip of the Day").
- Phineas and Ferb meet Thaddeus and Thor ("Thaddeus and Thor").
- The Paper Pelican flies in the sky and break Howard Hughes and the Spruce Goose's record ("De Plane! De Plane!").
- Perry is assigned to a new villain and family, making Phineas and Ferb think Perry is lost ("Oh, There You Are, Perry").
- Perry gets re-assigned back to Doofenshmirtz and the Flynn-Fletcher family.
- Phineas, Ferb, Isabella, Candace, Linda and Lawrence get shipwrecked ("Swiss Family Phineas").
- Phineas and Ferb meet their new extreme fan, Irving ("Hide and Seek").
- Phineas and Ferb and their friends shrink down ("Hide and Seek").
- Baljeet tries to impress an old friend from India, Mishti Patel ("That Sinking Feeling").
- The Baljeatles is formed ("The Baljeatles").
- Phineas and Ferb get X-Ray glasses, that are a total bust and then they improve their X-ray Glasses ("No More Bunny Business")
- Phineas and Ferb leave current Danville to go back in time (see the prehistoric section of this timeline ("It's About Time!").
- Phineas and Ferb leave, and later return, from the future Danville ("Phineas and Ferb's Quantum Boogaloo").
- The Earth and the rest of the universe grow to a massive size, though no one notices ("Attack of the 50 Foot Sister").
- Isabella grows a crush on Phineas, Candace with Jeremy, and Ferb with Vanessa.
- Phineas and Ferb directed the Summer version of the music video "It's On" from "Camp Rock 2: The Final Jam" kicking off Disney Channel's Summer Vacation.
- Phineas, Ferb, and their friends travel around the world ("Phineas and Ferb Summer Belongs to You!").
- Jeremy and Candace become boyfriend and girlfriend ("Phineas and Ferb Summer Belongs to You!")
- Phineas and Ferb attend Clive Addison special effects convention ("Nerds of a Feather").
- Candace finds out Linda is Lindana ("Ladies and Gentlemen, Meet Max Modem!").
- Phineas and Ferb discover Perry's double life and they go on an adventure to a parallel universe to thwart a more evil Dr. Doofenshmirtz (Phineas and Ferb The Movie: Across the 2nd Dimension).
- Perry has a spy mission go terribly wrong causing him to disappear. ("Where's Perry?").
- Perry goes on a joint mission in Canada with Lyla Lolliberry. ("Sidetracked")
- Stacy discovers that Perry is a secret agent. ("Happy Birthday, Isabella")
- Doofenshmirtz's new inator drains the power from the Marvel superheroes and Phineas and Ferb try to figure out what happened. ("Phineas and Ferb: Mission Marvel")
- Phineas and Ferb are thrust into a global rebellion when the plans for blowing up the Death Star accidentally fall into their hands. ("Phineas and Ferb: Star Wars")
- Phineas and Ferb deliver presents to Danville in Santa's place. ("Phineas and Ferb Christmas Vacation!").
- Phineas and Ferb build their own New Year's ball and drop it from outer space. ("Happy New Year!")
Act Your Age:
- Phineas realizes Isabella has been crushing on him
Phineas and Ferb's Quantum Boogaloo:
- Candace marries and has 3 kids, Xavier, Fred and Amanda
- Phineas and Ferb arrive from the past, so Candace tries to bust them again
- Candace goes back in time to bust them, but ends up allowing Doofenshmirtz to take over the Tri-State Area
- She goes back in time again to stop herself from busting the boys, reversing the bad future
- Heinz Doofenshmirtz is born in Gimmelshtump
- Heinz Doofenshmirtz loses Choo-Choo, turning him evil
- Phineas and Ferb get Perry from the adoption center
- Perry goes to fight Doofenshmirtz and is turned into Platyborg
- Doofenshmirtz takes over the Tri-State Area
- Candace forms the Resistance to fight Doofenshmirtz
- Phineas-1, Ferb-1, Perry-1, Candace-1 and Doofenshmirtz-1 arrive from the 1st Dimension
- Doofenshmirtz tries to take over the 1st Dimension
- Platyborg's programming is reversed, so he is no longer evil
- Doofenshmirtz is defeated and the Tri-State Area is returned to normal