Ori Hofmekler on his excellent blog says:

It is now known that the sympathetic nervous system virtually rejects eating! Here is the heart of the problem: most of us eat under stress during the day – and we’re not supposed to! We are supposed to eat very little! That’s the way the human body was designed. When you take a flesh machine designed to run on very little food and overwhelm it with food, bad food to boot, bad things are going to happen. Recent scientific literature on intermittent fasting proves my point.

I’m convinced that eating at night is very natural. It makes sense that Primal Man would feast at night after hunting during the day, and I have tested this theory out on myself with excellent results.
The typical anecdotes you hear from people are usually along the lines of “eating at night is bad because food will turn to fat whilst you sleep”. Well I say to that; RUBBISH.

Check out the rest of the article here, it’s an excellent read http://www.warriordiet.com/blog/archives/8-Are-We-Inherently-Night-Eaters.html