If you're hungry and not trying to make breakfast, lunch or dinner at home you are not without options as there are plenty of restaurants and other eateries open Christmas day. Here's a list of some of the open businesses. Please add others you may know of in the comments.
Aji 53
11:30 a.m. - 3 p.m. for lunch, 5 - 10 p.m. for dinner.
Smithtown Bagels
Christmas hours were not posted.
Millennium Diner
Christmas hours were not posted.
Hotoke Sushi & Steak House
1 - 10 p.m.
Premiere Pastry Shop
7 a.m. - 3 p.m.
The Bagel Gallery (24 Hour Bagels)
5 a.m. - noon