Will you gain weight if you eat over night while you work over night?

Eating overnight is not bad in and of itself. If you are awake overnight, that is when you should eat! Traditionally people say not to eat at night because when you are asleep, your body's processes are slowed down so people worry that food won't be digested properly. Additionally, eating right before bed can make it hard to fall asleep. So if you're awake at night, just eat your meals as you would if it were day time.