Today is Gonna Be a Great Day

 is the theme song to Phineas and Ferb that plays in the opening of every episode in the series.

Lyrics
Broadcast Version= There's a hundred and four days of summer vacation, Then school comes along just to end it, So the annual problem for our generation Is findin' a good way to spend it...

Like maybe: Buildin' a rocket or fighting a mummy Or climbin' up the Eiffel Tower, Discoverin' somethin' that doesn't exist (Phineas: Hey!) Or givin' a monkey a shower! Surfin' tidal waves, creating nanobots, Or locating Frankenstein's brain, (Phineas: It's over here!) Finding a Dodo bird, painting a continent, Or driving our sister insane! (Candace: Phineas!)

As you can see, There's a whole lot of stuff to do before school starts this fall (Phineas: Come on, Perry!) So stick with us 'Cause Phineas and Ferb are gonna do it all! So stick with us 'Cause Phineas and Ferb are gonna do it all!

Candace: ''Mom! Phineas and Ferb are making a title sequence!'' There's a hundred and four days of summer vacation, 'Til school comes along just to end it, So the annual problem for our generation Is findin' a good way to spend it...
 * -|Extended Version=

Like maybe: Buildin' a rocket or fighting a mummy Or climbin' up the Eiffel Tower, Discovering somethin' that doesn't exist, Or givin' a monkey a shower! Surfin' tidal waves, creating nanobots, Or locating Frankenstein's brain, Finding a Dodo bird, painting a continent, Or driving our sister insane!

This could possibly be the best day ever, (This could possibly be the best day ever) And the forecast says that tomorrow will likely be a million and six times better. So make every minute count, jump up, jump in and seize the day, And let's make sure that in every single possible way, Today is gonna be a great day!

Crossing the tundra or building a roller coaster, Skiing down a mountain of beans, Devising a system for remembering everything, Or synchronizing submarines. Racing chariots, taming tiger sharks, constructing a portal to Mars, Building a time machine, stretching a rubber tree, or wailing away on guitars! (Oh, man.)

This could possibly be the best day ever, (This could possibly be the best day ever) And the forecast says that tomorrow will likely be a million and six times better. So make every minute count, jump up, jump in and seize the day, And let's make sure that in every single possible way, Today is gonna be a great day!

Hey! (x8)

Let's put our heads together and design a master plan, We may miss dinner, but I know Mom will understand. We've got our mission and some pliers, yogurt, gumballs and desire, And a pocket full of rubber bands, the manual on handstands, A Unicycle, compass, and a camera that won't focus, And a canteen full of soda, grab a beach towel, here we go! (This is Ferb-tastic!)

This could possibly be the best day ever, (This could possibly be the best day ever) And the forecast says that tomorrow will likely be a million and six times better. So make every minute count, jump up, jump in and seize the day, And let's make sure that in every single possible way... (Seriously, this is gonna be great.)

This could possibly be the best day ever! (This could possibly be the best day ever) Today is gonna be a great day! This could possibly be the best day ever! Today is gonna be a great day!

Writers

 * Jaret Reddick
 * Dan Povenmire
 * Michael Culross
 * Jeff "Swampy" Marsh
 * Michael W. Walker
 * Carl H. Williams