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St. Patrick’s Day: From Solemn Observance to Global Green Celebration

Once marked by the color blue and quiet religious feasts, St. Patrick's Day evolved into a vibrant celebration of Irish identity and nationalism.

Britain's Kate, the Princess of Wales, smiles as she joins the Irish Guards, their veterans, families, serving soldiers, reservists, and young cadets from Northern Ireland, at a special St Patrick's Day parade and celebration at Wellington Barracks in London, Monday, March 17, 2025.(AP Photo/Kirsty Wigglesworth)
A giant St. Patrick float makes its way along a street during the St. Patrick's Day parade in Montreal, Canada, on March 17, 2024.
Britain's Kate, the Princess of Wales, arrives to join the Irish Guards, their veterans, families, serving soldiers, reservists, and young cadets from Northern Ireland, at a special St Patrick's Day parade and celebration at Wellington Barracks in London, Monday, March 17, 2025.(AP Photo/Kirsty Wigglesworth)

Overview

  • St. Patrick’s Day was originally a solemn Catholic feast day associated with the color blue, not green.
  • The adoption of green as a symbol of Irish nationalism began with the 1798 United Irish rebellion against British rule.
  • St. Patrick, a fifth-century Romano-British bishop, played a key role in spreading Christianity in Ireland but did not introduce it to the island.
  • Popular myths about St. Patrick, such as driving snakes out of Ireland and using the shamrock to explain the Holy Trinity, are not supported by historical evidence.
  • Modern St. Patrick’s Day celebrations, especially in the U.S., reflect Irish immigrant pride and have transformed into global festivities emphasizing Irish culture and heritage.