A calendar cube is made of eight individual cubes, each cube having six equal cube sides. Single pliable sheet material covers selected individual cube sides. Double pliable sheet material covers selected adjacent cube sides, forming a hinge portion oriented therebetween. Twelve individual cube faces are provided by a first set of six cube faces and a second set of six cube faces. Each month of the year is selectively positioned upon a selected one of the twelve cube faces, so that the user may selectively display a monthly calendar and advertising indicia thereon, which provides the current month and date. Manipulation of selected cubes, positions the current month on the top face of the cube. This is a challenge which changes month to month, and provides entertainment to the user of the calendar cube apparatus.