The league returned to Roman numerals for Super Bowl 51 (LI) and has kept that numeration system in place ever since. No plans are in place to return to Arabic numerals for the Super Bowl — yet.

The Roman numerals were adopted to clarify any confusion that may occur because the NFL championship game — the Super Bowl — is played in the year following a chronologically recorded season.

On March 15, 44 B.C. Julius Caesar was murdered by a posse of Roman senators. Today, on the anniversary of the historic murder, we imagine the sort of after-party the killers might have thrown.

What about Roman numerals? Find out in the quiz This week calls for some throwback thinking. If you can recall how Roman numerals work, you'll get at least one question correct.

This year's version of the NFL's biggest game is Super Bowl LIX — or Super Bowl 59, if you're not well versed in Roman numerals. Unlike the other major American sports leagues, the NFL uses ...