A Brief History of St. Patrick's Day

— -- St. Patrick’s Day, the day some pretend to be Irish and down a few pints, is one of the most beloved holidays on the calendar.

But more than 1,500 years after St. Patrick’s death, the truth about how the March 17th holiday got its start remains a surprising tale for most revelers.

To clear up the mythology surrounding this adored holiday, ABC News’ George Stephanopoulos has a brief history of St. Patrick’s Day. Watch the video above.