While the term “Perpetual Calendar” technically refers to a calendar system that can be used for any year, it is commonly used to describe a date display mechanism often found in mechanical watches.
A Perpetual Calendar, in essence, can be considered as a calendar that continues endlessly. By using mechanical components to adjust the “year” and “month” each time the month changes, the dates for the month are displayed on the calendar.
“ROBOTIME: Perpetual Calendar”
ROBOTIME is known for producing various DIY products, and they have also created a “DIY” Perpetual Calendar.
By assembling each piece, you can create a “perpetually ongoing calendar.”
The product is entirely made of wood and has a relatively thick build, making it sturdy. Among the various DIY products, this one falls into the category of moderate difficulty.
The product is available for purchase on AliExpress, priced at $17.99.
- AliExpress “ROBOTIME: Perpetual Calendar”: https://s.click.aliexpress.com/e/_AcTypc