All you knitters or crocheters, this one's for you: temperature blankets.
The basic idea is that, every single day for an entire year, you'll stitch up a new row (or square or circle or other shape). The color you choose is determined by the outside temperature.
When I first came across one on Instagram, I thought it was something pregnant women did to kill time while waiting for baby to arrive. I thought these soon-to-be-moms were measuring their internal body temperature not the one outside. I can see now that I made it too complicated, and weird. To be fair, the crocheter of the one I saw had described it as her "daughter's temperature blanket."
Anyway, it's a super cool and simple idea. And it leaves plenty of room for creativity.
Most people start them at the beginning of the year, but you seem like a rebel to me. Start one today.