This is the only calendar you will ever need. Ever.
Made for the Museum of Modern Art in New York and a hit with engineers of all stripes, this injection molded perpetual calendar was designed by Gideon Dagan, who has developed a plethora of consumer and commercial products, some of which are displayed at museums around the world. To mark the date, you simply move the two magnetic balls; remembering the year is on you. Available in red or black, the calendar can be wall-mounted or used on a desktop. It costs about $45 at the MOMA website.
Image courtesy MOMA.
Up next: For the comics collector