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.

The BriefNew York City is celebrating its 264th annual Saint Patrick’s Day Parade on Monday.The parade, marching along 5th Avenue, begins on 43rd Street and ends on 79th.It's one of the oldest and largest parades in the U.

Hundreds of thousands marched up Fifth Avenue and nearly 2 million lined the street for NYC's St. Patrick's Day Parade on Monday.