Foldable 2005 monthly calendar cube template with two color options and holder. Available in blue or red and offered with a gray, foldable holder template, this calendar template includes instructions for assembly.

I found this free offering on the HP website. It appears to be totally free to use, adapt, develop etc. Basically, it makes into a cube desk calendar: a good craft project for younger children, leading to a novel gift for a parent or grandparent.