Legend has it that a sip from the Old Well on the first day of classes brings students good luck — even a perfect GPA. Thousands of Carolina students line up at the well every year to test the theory for themselves.

But the legend’s origin has been a bit of a mystery.

To find out when the tradition started, University archivist Nicholas Graham turned to a trusted tool: Facebook. He reached out to UNC-Chapel Hill alumni who graduated in the '70s, '80s and '90s to learn the whole story.