Saint Patrick's Day is celebrated on March 17th to honor Saint Patrick, the patron saint of Ireland. It is celebrated by Irish people and those of Irish descent through wearing green, eating Irish food and drinking, and attending parades and pubs. Saint Patrick was a Christian missionary who lived in Ireland for six years after being captured and enslaved there as a teenager, before escaping and later returning to convert the Irish to Christianity. Symbols of Saint Patrick's Day include the shamrock and the Celtic cross, which incorporated traditional Irish symbols with Christianity. Parades are held worldwide on Saint Patrick's Day, with the largest in New York City watched by over 2 million people.