I agree that eating from noon to 5pm can be an optimal eating window, but you are going to have to eat a large amount of food at noon and a relatively small meal at an early dinner if you're not eating breakfast. That's possible for some people; but I think the vast majority of people prefer to eat 3 meals a day and are better off consuming the bulk of the calories earlier. My personal experience with people that skip breakfast: they tend to have a moderately large lunch and a moderately large dinner, which is probably not optimal. And that's because when delaying food intake in the morning, they tend to grow relatively hungrier as the day progresses.