Adam+Harborth is a Berlin-based design consultancy with a roster of international clients. Such a pedigree might suggest a certain seriousness, but the designers also put high value on the power of fun and exploration. All it takes is four cubes--two lettered, and two numbered--to display the date and day of the week, forever and ever, into perpetuity. Made from solid beechwood in Germany's fabled Black Forest, each cube is screen-printed by hand and completed with a waxed finish. A smart addition to your desktop or office shelf, you can arrange them a new way each day: as a stacked tower, in a square or lined up in a row.