(CNN)Every March 17, the world suddenly looks a bit greener as people don the color to celebrate St. Patrick's Day.
All your burning St. Patrick's Day questions answered
From shamrocks and leprechauns to corned beef and green beer, here's what you need to know about the holiday.
St. Patrick's Day is the feast day of St. Patrick, who is the patron saint of Ireland. In addition to its religious roots, the holiday has become synonymous with the color green, shamrocks and festive drinking.
St. Patrick was a Christian missionary who converted the Irish people to Christianity.
He was born in Britain in 385 AD and brought to Ireland as a slave when he was 16. Six years later, he escaped to a French monastery, became a priest and returned to Ireland to spread the teachings of Christianity.
Legend says that he also drove the snakes out of Ireland. However, biologists say there were never any snakes in Ireland in the first place.