Brad Paley, sometimes teaching at Columbia University, who also designed Text Arc has depicted the calendar graphically in an excellent circular form with equal distances between numbers, fig 96. It is informatively named Once more around the Sun 2008 a package of 7 calendars, brilliant symmetry and fidelity from its accuracy.
The book Mapping: An Illustrated Guide to Graphic Navigational Systems has a high focus on the graphic element and has a chapter looking at examples of representations of time & space featuring work by NB: Studio - London Kerning
Paley, Bradford. (2008). Information Esthetics - calendar