Abstract: A calendar has transparent overlay pages which carry opaque calendar data areas and opaque picture portions which are superimposed on an underlying picture, with the opaque picture portions depicting the underlying obscured portions at a different season of the year.

Abstract: A greeting card having a front leaf, a center leaf and a rear leaf is formed of a single piece of paper folded into quarters and cut at the upper edge of the center leaf, enabling the center leaf to move from a position where it overlies the rear leaf to a position where it overlies the front leaf. Pictorial material on the center leaf has the same shape and location as pictorial material on the underlying leaves; and, the center leaf has transparent cutouts which expose textual or pictorial material on the underlying leaves.

Abstract: A calendar has transparent overlay pages which carry opaque calendar data areas and opaque picture portions which are superimposed on an underlying picture, with the opaque picture portions depicting the underlying obscured portions at a different season of the year.An overlay sheet with a transparent area is movable to positions where it overlies either a first base sheet or a second base sheet. An opaque picture portion in the transparent area is formed to be camouflaged when overlying one of the base sheets; and, the opaque picture portion presents a visible pictorial element when it overlies the other base sheet. An opaque area on the overlay sheet causes messages first to be concealed when the overlay sheet is in one position and then to be revealed when the overlay sheet is moved to its other position.