And they're off! Time for The Wonder Years to take on their "Four Shows In 24 Hours" tour!

"The 'Four Shows In 24 Hours' tour promises to be the most exhausting day of our lives," The Wonder Years frontman Dan Campbell told us earlier last month. And true to their word, the seminal pop-punk vets have done what was once thought to be impossible: In honor of their latest record, The Greatest Generation, The Wonder Years took on four shows in 24 hours (May 10-11), playing to audiences in Philadelphia, New York City, Chicago, and Anaheim all in one day. (Beat THAT, Rihanna's "777" tour!)

Check out more photos of The Wonder Years on their 24-hour tour after the jump.

Anyway, HOW is this possible? Aren't the "Passing Through A Screen Door" singers maybe embellishing just a tad? Nope, The Wonder Years did, in fact, play all four cities in one day, and they've got the photos to prove it. (Also: huzzah for time zones!) Scroll through photos of The Wonder Years' "Four Shows In 24 Hours" tour (including some very endearing "tired at the airport" shots) below!

The Wonder Years catch some shut-eye en route to Chicago.

The Wonder Years set up shop at Philly's First Unitarian Church.

+ CHECK OUT MORE PHOTOS OF THE WONDER YEARS' "4 SHOWS IN 24 HOURS" TOUR.

+ PLUS: Watch The Wonder Years' "Buzzworthy Live" performance of "Dismantling Summer."

Photo credit: Mitchell Wojcik