For those that may not know, the letters are Roman numerals which tell us which edition of the big game is being played. Here's a quick cheat sheet: "I" means one, "V" means five, "X" means 10 and ...

Each year, a chart circulates online purportedly showing Google search trends for "super bowl" and "how to read roman numerals" in lock-step with each other, peaks lining up every Super Bowl season.