One thing i like about this one is how they have used the shapes on each of the calendars. Although the shapes might not have a meaning they work really well because its kept so consistent throughout. Another idea for something similar to this would be maybe to use different icons to represent the month of the year. For example maybe use star signs for the different months or different weather icons such as winter or autumn depending on the month.
Swan Heart Shape, Nursery Wall Art Printable, Printable Illustration, Printable…
2017 Lunar Calendar Print
2016 Lunar Calendar Print by GoldFoxJewelry on Etsy