Loved by designers, but great for a domestic wall too, the calendar was first produced in 1966 and its status was confirmed by its addition to the design collection of the Museum of Modern Art in New York. The only calendar in there.
A timeless (but also retro) design, it consists of 12 large sheets of 60lb paper (the whole thing is 122cm x 91cm), each randomly alternating in black and white and using the Helvetica typeface. You can tear each month off when it has passed. The calendar is finished with three matte black metal eyelets on the binding strip for easy hanging.
If you are planning ahead or just don’t want it to sell out, TwentyTwentyOne has it for £46.