Dale Irby yearbook pictures: Gym teacher wore same outfit in yearbook photo for 40 years

An elementary school gym teacher from Dallas, Texas is retiring after 40 years, and so is his trademark yearbook outfit.

Dale Irby accidentally wore the same outfit, a Brown V-neck sweater and a groovy polyester shirt  for the school yearbook photo for 1973 and 1974.

His wife thought it was funny and dared him to wear the same outfit for a third year in a row.

Irby told the Dallas News that he accepted the challenge and after five years he thought, "Why stop?" and decided to wear the same outfit year after year for decades. The only things that changed: his glasses, mustache and hair.

Scroll through all of Irby's yearbook photos over the years. Click here: http://bit.ly/15ggWFj