This plan entails four weeks from every month, so whenever there are five weeks in a month, we take a breather on that last week. And by "breather" I mean, catch up on anything you're falling behind in. Make sure everything is up to date. Shop if you need to. Then, be sure to take some time and do organizing in your food storage area. Somehow things seem to get a bit disheveled here and there, and it's good to have a designated time to organize.
Also, at the end of each month, go back through the main inventory sheet and be sure that everything coded in that month's color has been checked and updated. This way things don't fall between the cracks.
And once all of that is done, sit back and enjoy the rest of this week. And feel Oh-So-Good about what you are doing for your family!