After the week was over, my wife and I sat down to make a shopping list.  We thought about foods we wanted to eat that week.  I looked up some things on the internet that we could try, that we had never tried before.  We found some good recipes and made note of what food that they needed.  We wrote down the food and the amount that we would have to buy to make the recipes.  We circled all of the food on the list that we thought we might not need to buy.  We took the shopping list and also wrote down where in the store we would find the food.  We organized it from the fruit to the dairy in an organized order.  We put the shopping list on our fridge so that we wouldn't forget it the next day when we went to go buy the food. 
Question: When did they go to the store?
the day after writing the list