depends; typcially the body sleep wake cycles should be in bed by 10 and up at 6am though if you changed your bodies natural rythem where you sleep later and wake up later than it is possible.. I reccomend not eating with in 4 hrs of going to bed if you want to get lean..
though depending on your goals you may want to eat later... though remeber if you eat late at night you are giving the body the job to digest your food you ate and if you are going to sleep right away it will take away from your rem sleep the deep sleep where you release higher levels of growth hormone, we all know how important this is so I wouldn't miss out on it so I personally don't reccomend big hard to digest meals before bed.. I would use the 4 hr rule... though sleep is essential and if your not getting quality sleep and not on the bodies rythem it can cause problems down the road, not to mention it can hurt you a great deal if you try to build muscle or lose fat. Quality deep sleep is essential for the human body, where we recover and rebuild...