Actually, a lot of people think that overfeeding once a week can help you continue to burn fat in the long run because it reprimes your fat loss hormones. And if you have ever done some extreme overfeeding, you can actually feel your metabolism going back up. The large and massive amounts of meals really causes your heart rate to go up. What would be ideal is tons of simple carbs like pasta, bread, crackers, but still make sure you are getting some protein and unsaturated fat.
In my opinion, almost anything that shocks your body is good - even overtraining, but only once in a while. But if you are severely restricting calories for a week, just one day of overfeeding/maintainence calorie diet I dont think will be enough to get your fat loss hormones back up and to gain back some of the muscle you lost.