About this 3D model

My wife saw this perpetual calendar online, but with my 3D printer, why would I buy one? I just followed the design and made one myself. I'm new to drawing, so please be gentle. Regarding the main body and base, there are two connecting pieces. This is because the mortise and tenon structure is not convenient to print as a whole, so I cut it into two pieces. The very small part is because it exceeded the height of the white material, so it had to be printed with black material. As you all know, changing filament with bamboo is wasteful, so I cut it again. I could have modified the base, but I was too lazy. Feel free to modify it if you like. All files can be printed without support. The two black rings are for the day of the week and the month, while the red ring is for the date.