And in the middle is a holiday associated with merry drinking and a centuries-old religious figure: St. Patrick's Day. Monday, March 17, is the holiday to celebrate everything Irish, including St.

St. Patrick’s Day, the annual celebration of all things Irish, is being marked in cities across the country on Monday with boisterous parades and celebrations. New York City hosts one of the largest and oldest parades in the United States.

It was a sea of green and gold in St. Paul on Monday as thousands gathered to celebrate the city's annual St. Patrick's Day parade. "It's beautiful to see everyone wearing green — no matter what your nationality or where you're from," Dan Kelly said.