Like all good ideas, this one was heavily inspired (if not plainly just copied) from Neatnik, so head on over there to check out what other nice things Neatnik has. It is not my intent to just copy their work, but I found the calendar idea so useful for planning and tracking, that I wanted to add a bit more things into it, and to take my knowledge of Tailwind a bit further by replicating what they did.
Just print this page to get a nice calendar that you can scribble on. Landscape mode is recommended.