It 's designed to be made with 1/8" birch and takes a little more than a single board. I used used pre-painted boards because it’s easier than painting after the fact.
The file is available at etsy.com/shop/IronHorseVintage29. There’s a version for Mommy too. It will be available by the weekend.
This is similar to the military’s “Short Timer” calendar. You might want to add a couple of other versions for PCS (permanent change of station) and ETS (Expiration term of service).
When I was in the military, there are dozens of different short timer calendars that we used for when we were about a year out of moving to our next unit or getting out of the service. Oh and don’t forget, sister, brother, uncle, aunt, best friend, etc.