|March 16th is a day to wear green. Across Ireland, the US, and many other parts of the world it is a cause for celebrating, merry-making, over-eating, over-drinking, and overindulgence. A Christian festival, St. Patrick's Day celebrates both the end of Lent and Ireland's most famous patron saint, Saint Patrick. Credited for introducing Christianity to Ireland's pagan population, Irish folklore tells how he used the famous symbol of the shamrock to explain the holy trinity to the people. Nowadays the festival is not only about religion, but is also a general celebration of Irish culture. It has been embraced across the UK as a general evening of merriment and drinking, and an excuse to have a good time, whatever your nationality. During the day public parades, celebrations and marching bands take to the streets and rile the general public with large banners in gold and green. At night, copious amounts of alcohol is drunk. Particularly favoured by students, scores of party-goers will fill the pubs to drink Guinness with their peers, wearing novelty leprechaun-style hats and over-sized shamrock foam fingers.