Calendar Board

A perpetual calendar for the desk or the wall. Every weekday, date and month is a well sunk into one plate with its label standing in the middle, and three rings say which is today. Tomorrow you move one ring.

The ring is an annulus, so it frames the date instead of hiding it — you can still read the day you are pointing at. No year anywhere: it never goes out of date. The week starts on Monday or Sunday; the name along the foot. PLA.