I was invited to join in on a calendar project between friends (thanks Nika! https://www.behance.net/nikabanzuela). This was a great way for all of us to stay connected and work together. Everyone gets one month, set to 17 x 11, and that's about as far as the rules went.
I was excited to have ended up with the month of December because it is a time that closes out the old and can set up the new. This transition was a big guiding detail for me in addition to the calm of winter environments.