Wednesday marks a special occasion in northern New York — 518 Day.The date is celebrated annually on May 18 in recognition of the region's area code, 518. It has become a date some residents use to express why they love the area. NBC5 News is celebrating with a live broadcast from Plattsburgh's Trinity Park beginning at 5 p.m. The evening shows will include a number of interviews with local leaders and previews of some notable summer events. Click here to view a live stream of the broadcast.