American MoMA modern minimalist style time device cube calendar building blocks perpetual calendar birthday gift

The building block calendar is a gift for astronomy enthusiasts. The highlight of the design is that the six sides of the cube can be used to adapt to the deviation of the calendar. Only four cubes are used to present the month, week, and day. The date can be combined and matched at any time and space, thus achieving permanent recycling. There are two versions of the building block perpetual calendar, one is black, gray and red distinguished by color brightness, and the other is red, yellow and blue distinguished by the three primary colors. Learn how to calculate the week and enjoy immersive calculations at any time. Put it on your desk to improve your sensitivity to dates.