From the Museum of Modern Art (MoMA) product collection. Designed by Gideon Dagan, 1998. This iconic Perpetual Calendar was designed for MoMA in 1998, the smaller version was introduced in 2008. To use, simply insert the stand to place the calendar on a desk and move the magnetic balls manually to mark the date and month. Made in China of injection-molded plastic and magnets. Boxed.