Monthly Calendar.

It's a calendar.
It can be expressed every month using the adjustment bar. However, it is difficult to express in February.
You can output the body and adjustment bar in different colors, assemble them, and use them.
It is possible to assemble it at a sufficient distance, so it needs to be assembled with glue.

When I made it, the visibility of the date was not good, so I will revise it and upload it again.

Have a great 3D printing life.