Your biggest meal of the day should be your for the morning. This is because the time period between 9am and 6pm consists of the core working hours of most people. It's the time when your body will be extremely active and will need a lot of energy. Activity translates into calorie burning. Having full breakfast will provide you with the energy that are needed to sustain yourself throughout the day. Also, it can prevent overeating or binging during lunch hours.