The story behind this set is actually quite simple.
You might wonder why 'Monday before Sunday' because it doesn't make any sense, right? Monday comes always after Sunday.
True, in most cases Monday comes after Sunday but it can come before as well. If you think about it, then actually it depends on from which end of the week you're looking at.
Monday comes before Sunday on Sundays.
Same logic applies to all the pictures in this set. At first they don't make any sense but if you start thinking then it depends on what you are looking at and from which end. They all have a beautiful story to tell.