Rie found this beautiful calendar from Pi'lo. As one commenter on Rie's site suggests- you could switch out the bear for a Snowman or Christmas tree in winter or to something else for another holiday to get even more use out of it.
Pi'lo makes plenty of other gorgeous things for children and the home and they all have a similar pure and natural aesthetic. Check out the Etsy Shop. We're pretty sure you'll be bookmarking it just like we did.
Thanks for the sweet idea Home and Harmony.