Perpetual Calendar

April 18th, 2019

Over the last year or so I’ve been researching, testing, and fabricating my first perpetual calendar clock. If you’re curious about what the term “perpetual calendar” means I should explain: A simple calendar mechanism, or complication, shows what the date is, sometimes accompanied by the day or month. In order to be designated a “perpetual” calendar clock things get quite a bit more complex. These mechanisms also account for whether there are 30 or 31 days in the month, and they will automatically advance the indicator (in this case the hands) accordingly. In addition it keeps track of when it’s February, including knowing when it’s leap year, so the hands automatically jump from the 28th or 29th of February to the 1st of March.

This project is less than half way finished. If you compare this to my completed work you’ll notice that I have yet to sculpt the flat cut-out pieces into 3D forms. I do however have the perpetual mechanism in place and it’s working great so far. It’s also keeping really good time!

It should be done by the end of the year. Stay tuned.

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