The blocks can be made into a large quilt or just make a section or two for several smaller wall hangings since the months are grouped. Although these look like Attic Windows, they are called Cupboard Blocks for this quilt. Use a plain background if you wish, but the overall design of the finished quilt is to look like a cupboard with vases of flowers, teapots and cups and other objects on the shelves.
This piecing gives a dimensional look to the background, in effect a “Trompe-l’oeil”, which is French for an optical illusion. Those usually have shadows behind the objects on the shelves, but that would get a little complicated. Maybe that is something that could be added to the quilting.