Tomorrow is the Disney Channel premiere of the full-length movie "Phineas and Ferb Across the Second Dimension." If you already have Friday plans or don't subscribe to cable television, the DVD release is August 23rd.
As it turns out, Phineas and Ferb apparently are Latin students, because one of the songs on the soundtrack (already available on Amazon.com and presumably, iTunes) is entitled "Carpe Diem!"