Are you eating breakfast? Research studies from the Harvard School of Public Health (HSPH) has suggested that non-breakfast eaters were generally hungrier later in the day and ate more food at night which may lead to metabolic changes and heart disease. The study can be found by clicking this link.
Is something triggering the eating such as stress? Do you have an impending deadline at office that is making you jittery? Try to determine what is triggering your desire to eat. Once you can determine this, you can manage the stress rather than consuming empty calories to make you feel better.
The Mayo Clinic has indicated that, sometimes, the strongest food cravings occur when you’re at your emotional weak-point. In this situation, you may turn to food for comfort when facing a problem, feeling stressed, or feeling bored. This can sabotage your weight-loss efforts and often leads to overeating high-calorie, sweet and fatty foods.
Please see the Mayo Clinic article here.