It's great to follow tradition, but it's also smart to consider the science behind the dinner -- or, at least, our digestion of it. Dr. Aja Mccutchen, a gastroenterologist, had this to say about the wisdom of a daytime meal: "The emerging field of chrono-nutrition allows us to understand the relationships of meal timing, circadian rhythm and our metabolic health. Eating earlier allows us to recover from the larger than normal consumption, allowing us more efficient digestion and metabolization."