Saint Patrick’s Day is a world-wide Irish celebration in the honor of the patron saint of Ireland who escaped slavery and converted thousands of Irish Pagans to Christianity. It is celebrated with large parades, parties, food, drinks, and a ton of green. At the end of the celebration, a shamrock will be dropped into a cup of whisky and drunk in the honor of Saint Patrick. According to the legends, St. Patrick used a three leaf shamrock to explain the holy trinity to the pagans. (Wiki, history.com)