It is not recommended to lose weight during the official holidays. During this period, more nutrients are lost, and forced dieting will make your situation worse. And this period of time will only reduce water, not fat. The best time to lose weight is 7- 14 days after the official holiday. The metabolism is faster and it is easy to lose weight. Besides, it is wrong for you to say that you don't eat fat during holidays. During this period, iron and various trace elements should be supplemented, but eat less things with excessive calories. If you eat too much, you will get fat. Dieting should also pay attention to the intake of calories can not be lower than 1200 calories, otherwise it is easy to rebound.