Describes the history of Saint Patrick's Day as well as how it is celebrated in Ireland and the U.S.

What is Saint Patrick's Day? -- Who was Saint Patrick? -- What did Saint Patrick really do? -- How did Saint Patrick's Day begin? -- What are Saint Patrick's Day parades? -- How else is Saint Patrick's Day observed? -- How has Saint Patrick's Day changed? -- How is Saint Patrick's Day observed in the United States? -- How is Saint Patrick's Day observed in Ireland?