Perpetual calendar with mechanically automatic day of the week (Ver. 1)
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PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
## Please visit [the things page of newer version (Ver. 2)](https://www.thingiverse.com/thing:7035937)
This calendar automatically keeps the day of the week correct for one year, from March 1st to the end of February of the following year. Unlike the incremental mechanism found in perpetual calendars of fancy mechanical watches, any drum can be rotated freely in either direction (CW and CCW) without limitation. This makes it convenient to check the day of the week for any specific date.
**New version is released and the old files are all deleted except the whole model as a record. To avoid confusion, I created [new things page](https://www.thingiverse.com/thing:7035937) for newer version, and keep this page as a stub.**
- Oct. 31, 2020 : Initial version is released
- Mar. 10, 2025 : Ver. 2 is released. Old files are deleted.
