This is a calendar driven by gears. Rotate the "week gear", and the large "date wheel" will follow the "week gear". and the “month gear” run 1/12 circle when “date wheel move from 31th to 1th”. The only thing You need to do is to turn “week gear”1/7 circle every day, and adjust the “week gear" at the end of every short month, the “week gear” and “month gear” are attracted by magnet, so it is easily be take off and move to the correct position.

There are two plates in 3MF file。

print all of them, it spend you about 3 hours.

Below explosion view show you how and where to press Magnets in without any adhesion. Please note that all magnets are instill from backside, don't install them from frontside!!! It may break holes.