Marlies of CraftMeister, Marlies Creative Universe, has made 12 sided dodecahedron cube calendars since 2005. And for a number of years she’s been sharing her downloadable calendars on her website.
Marlies has 12 different patterns that you can download for free. I downloaded 5 different patterns and made had a lot of fun making them.
You can download your own calendar from Marlies website: 2017 12-Sided Dodecahedron Cube Calendars Are Ready! She does ask for your email address, but the download is free.