St. Patrick's Day HISTORY: Must-Know Facts, Trivia For Irish Holiday (PHOTOS)

Happy St. Patrick's Day! Today, March 17, 2010, La Fheile Padraig (St. Patrick's Day in Irish) is being celebrated around the world.

St. Patrick's Day is a great excuse to party, whether you are Irish or not. Though the holiday began as a Catholic feast day, it's become a secular celebration of Irish culture.

Named after St. Patrick, who lived in the fifth century AD, St. Patrick's Day is a public holiday in Ireland.

It's also a great day to impress your loved ones with these fascinating St. Patrick's Day facts. Feel free to share them and vote on your favorites!