Designed in 1967, this particular perpetual calendar isn’t going anywhere; it’s in MoMA’s collection, if that gives you any clue to its staying power. Easy to use and easy to see, just flip the lithographed PVC cards to show the day of the week, date, and month.
Designer: Enzo Mari
ABS frame features lithographed PVC flip numbers and months.
Available in black and white.
6.5” x 3.5” x 6.25″.
Available from MoMA Store, $225.