St. Patrick's Day is an annual feast day that celebrates St. Patrick. How much do you know about St. Patrick? Did you know that he was the most commonly recognized of the patron saints of Ireland? The wearing of green ribbons and shamrocks began in celebration of St Patrick's Day as early as the 17th century. St. Patrick is said to have used the shamrock, a three-leaved plant, to explain the Holy Trinity to the pre-Christian Irish. Traditionally, those who are caught not wearing green are pinched, usually affectionately. A celebration that was once a church festival is now celebrated among the masses regardless of ethnic background. So done your best green outfit and enjoy some green beer!