Time Out says
No St. Patrick's Day in NYC would be complete without staking out a spot at this parade, which makes another glorious march up Fifth Avenue. (The event is even older than the United States; it was started by a group of homesick Irish conscripts from the British army in 1762.) More than 2 million onlookers are expected to show up for the annual spectacle. Fifth Ave from 44th St to 79th St.