HOME ESSENTIALS › MoMA Cubes Calendar Image 1 of 3 Image 2 of 3 Image 3 of 3 MoMA Cubes Calendar $16.50 MOMA Perpetual Cubes Calendar. Arrange the cubes of this Cubes Perpetual Calendar to indicate weekday, month and date. Quantity: Add To Cart Added! MOMA Perpetual Cubes Calendar. Arrange the cubes of this Cubes Perpetual Calendar to indicate weekday, month and date.