weekly calorie count

Does anyone do a weekly calorie countdown instead of a daily one? I would love your thoughts. I was recently in a situation where I was getting some assistance from a friend on something and they also presented me with a lovely dessert they made just for my visit. I was already at my calories for the day, but I would never turn down such a special gesture. Life does not always work neatly and orderly as far as food is concerned and it would seem easier to be able to balance an over day by compensating the following days. It would seem to also help with "what the hell" effect. That feeling that you have gone over your calories for the day so just make the most of it and go for it, because you can start again tomorrow.