Perpetual wall calendar, designed by Enzo Mari in 1963. The 'Formosa' Calendar has become an icon of the 60's but is also a timeless, essential object. This piece, incredibly graphic, displays a smart design that combines both visibility and easy use. Numbers, months and days of the week have been printed on metal slabs that are suspended on a support. You can turn them by hand, day after day, in order to form the correct date. This perpetual wall calendar is not limited to one specific year – it will show the day of the week for any date, whatever year it is.