In 1973, Dale Irby, who is retired gym teacher posed for his first yearbook photo at Prestonwood Elementary school. The next year, he accidentally wore the exact same outfit. At first Irby was horrified to discover the faux pas, but then his wife made a dare: do it again the next year. Before you knew it a 40-year tradition was born; from 1973 to 2012 the teacher, now 63, wore an identical sweater vest and collared shirt for every single yearbook portrait.
You can see a slideshow of the photos over at the Dallas Morning News.