Well, that's the great thing about New York. There are always stores open, even on Christmas Day. There are many convenience stores, bodegas, and gas stations that stay open to serve the people who are still out and about. And of course, there are always those 24-hour grocery stores that are always open. So, you won't go hungry or thirsty. But don't worry, even if you can't find an open store, there's always a warm and welcoming place where you can celebrate Christmas in the city.