In order to burn the most fat, you should go 12 hours overnight without eating.

The reasoning behind it is that during the day your muscles use some of the calories you eat for fuel, the rest is stored as glycogen.

Overnight, that glycogen is converted to glucose. Once the glycogen is gone, your liver starts burning the fat cells.

Fasting for 12 hours overnight allows your body the chance to convert the glycogen and start burning fat.

Therefore, if you usually eat your breakfast at 7:00am, try to have your dinner by 7:00pm the night before.