Corned beef and cabbage have become popular dishes associated with Saint Patrick's Day, particularly in the United States. However, it is not actually a traditional Irish dish. The association between corned beef and St. Patrick's Day can be traced back to Irish immigrants in America who substituted corned beef for bacon, which was more expensive in the US. Despite not being a traditional Irish dish, it has become a staple of Saint Patrick's Day celebrations in the US and other parts of the world.