Monday, March 17 is St. Patrick's Day, celebrating all things Irish in the U.S. and around the world. Cities celebrate with parades, bar crawls and more.

St. Patrick's Day celebrates Irish heritage globally with parades and festivities, particularly notable in cities across the US, including New York, Savannah, and Chicago. The celebrations commemorate Ireland's patron saint and have evolved due to contributions from 19th-century Irish immigrants,

It was among Irish American communities that the day became the celebration it is, from its roots as a more solemn day with a religious observance in Ireland.