Abstract: Apparatus for visually registering information, which apparatus utilizes an outer adjustable member containing transparent indicia, which indicia will become visually distinct when said indicia is moved to overlie an inner fixed member and a color area thereon differing from the color surrounding said indicia.

Abstract: A perpetual calendar operated by finger pressure wherein there is a base portion formed with horizontal grooves and including an overlay covering said base, the overlay has horizontal rows of etched transparent indicia. A plurality of slidable color plates are appropriately mounted in said grooves and when moved under said etched transparent indicia, visual registration of the specific transparent indicia is accomplished. The invention also includes color plate propelling means associated with the color plates extending exteriorly of said base and overlay for finger movement to slide the color plates into appropriate registry.