Is this 3D model free to download?

Yes, Perpetual calendar with mechanically automatic day of the week (Ver. 1) is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by shiura, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Perpetual calendar with mechanically automatic day of the week (Ver. 1) 3D printable model by shiura

Perpetual calendar with mechanically automatic day of the week (Ver. 1)

Source: Thingiverse by shiura

The Perpetual calendar with mechanically automatic day of the week (Ver. 1) is a free printable 3D model from Thingiverse by shiura. Please visit the things page of newer version (Ver. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

1,947 saves Source: Thingiverse Updated 2026-09-15 License: CC-BY-NC-SA · non-commercial 6 makes Category: Gadgets & Electronics

Tags: calendar, perpetual calendar

About this model

Please visit the things page of newer version (Ver. 2) 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 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.

Frequently asked questions

Is this 3D model free to download?: Yes. Perpetual calendar with mechanically automatic day of the week (Ver. 1) is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by shiura.
Who made this model?: Designed by shiura, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.