St. Patrick's Day happens every year on March 17th. This holiday includes celebrating Ireland, wearing green, leprechauns, pots of gold, and green shamrocks. It also most importantly celebrates St. Patrick himself. March 17th is the day Saint Patrick died in Ireland. St. Patrick was not actually Irish, though. He was born in Britain and kidnapped by Irish Raiders. While in Ireland, he converted to Christianity, started working as a Christian mercenary, and later returned to Ireland to spread Christianity. After he had passed away, the Irish people started to honor him by calling him the patron saint of Ireland. He became a symbol of the arrival of Christianity in Ireland. 

There is a story that Saint Patrick used the three leaves of the shamrock to explain the Holy Trinity. The four-leaf shamrocks were not a part of this story and are celebrated as being a symbol of luck and good fortune. Four-leaf shamrocks are known to be associated with the legends and myths of St. Patrick's Day, much like leprechauns, which were first written about in old Irish folk tales and later became a part of the celebration of St. Patrick's Day. The history of St. Patrick's Day and the holiday itself are very important to the people of Ireland. The holiday is a celebration of Irish culture with parades, special foods, music, dancing, and a lot of green.