This idea is very interesting to me. (NB: I’m always collecting ideas for cleaning and then not following through, in hopes of finding the one that will stick.) You put off the major cleaning tasks (scrubbing tubs, dusting, mopping floors, cleaning mirrors) to one time a month (and do the day-to-day tasks as needed in between, which could be dishes, tidying, vacuuming, toilets … all things we do maybe once a month anyway, ha ha).
The first part is here: Once a Month House Cleaning. She gives a handy list of what that entails, and this post is tips for making it work.