The Stendig calendar was designed by Massimo Vignelli back in 1966. The huge, 3 by 4 feet type-only calendar instantly made it into the collection of The Museum of Modern Art, New York (although there originally also was a smaller version).

The Stendig is the result of Vignelli's experiments with the positive and negative spaces of the letters and numbers of the (then upcoming) font Helvetica.

Oh, and if you're wondering what to do with the torn off pages: fellow-minimalist Junghoon Park has a suggestion.