Perpetual calendars rely on cycles that repeat. Native Americans used winter counts to convey and hold information about important events of the year with images.

Well, we’ve got a solution for you–a perpetual birthday calendar, and the best part? It’s absolutely free! Never miss another important date! You can use this free printable year after year ...

Create a DIY perpetual calendar using this free watercolor printable! It’s easy to make with Mod Podge and a few other basic supplies. Skills Required: Beginner. It helps to have some experience ...

Both of these watches also have a quick-change strap system, and come supplied with an extra strap. The L.U.C collection has ...

Just when you think you’ve seen them all, someone comes up with something new and unusual, like the concentric rings of this automated perpetual calendar. What we really like about the design ...

perpetual calendar, retrograde, etc, is special enough. However, rare is the year that sees a new world’s thinnest watch, as well as a tourbillon piece thinner than a coin, a moonphase accurate ...

Over the last few years, one brand has gone further with ... that range is the new Parmigiani Fleurier Tonda PF Hiriji Perpetual Calendar. Described as a "horological expression of the Tablular ...