Why this calendar is a Modernist icon

Massimo Vignelli’s designs include the New York subway guide and signage system, the Handkerchief chair, stackable dinnerwear and even logos for top American companies.

But it’s a calendar that he made for Charles Stendig, an American furniture importer and design entrepreneur, that made its way to the Museum of Modern Art and remains a design for all times.

Here’s why.