Although it hardly seems this way anymore, St. Patrick’s Day was originally a Catholic holiday honoring, you guessed it, Saint Patrick. St. Patty’s Day is the one time of year where everyone gets hammered, claims Irish heritage, and dons green duds and clovers (unless you live in Boston, where this is the norm).  Originally, St. Patrick used the three-leafed clovers to help explain the Holy Trinity to people as he traveled on his mission.  I don’t get why he didn’t just hold up three fingers, but whatever.  Do what you gotta do.