Uploaded May 2022 | Updated September 2026, 2 weeks ago

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The perpetual calendar is one of the representative mechanism of complication clocks and watches. It shows correct date up to 2099 without correction because it can handle all kind of month lengths including February of leap years.

Free 3D data and codes at
instructables.com/3D-Printed-Clock-With-Perpetual-Calendar
printables.com/model/209709-3d-printed-clock-with-perpetual-calendar
thingiverse.com/thing:5389410

Assembly guide
youtu.be/1Kx0vuQ4A5k