Create a DIY perpetual calendar using this free watercolor printable! It’s easy to make with Mod Podge and a few other basic ...

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 ... day or once a month.

Long before sustainability became a trending topic, people invented reusable, perpetual calendars, but the non-digital versions of these are sometimes complicated tables that are hard to interpret.