Unlike all of the perpetual calendars out there, this calendar is designed to be destroyed. You punch out the previous day with the included punch tool and then store it back in the base. There's something cathartic about destroying yesterday and moving on.

This print is set up for .16mm layer height so the top layers for the “days” are exactly two layers. Two layers is enough to cover the hole but still allow it to be punched. Any other layer height is untested. The included print profile has layer painting for the text and the bottom 2mm to make the inside of the holes match the theme color. Each month takes less than 30g of filament, so it's not too much waste over the course of a year. I recommend printing one month at a time rather than printing all of it.