3's Calendar It is a calendar of 3 months on 1 page. With perforations for each month, you can cut out only the amount that has passed, and new moons will appear one after another. The secret to being simple but never getting tired of it is the balance between black and white that changes every month. By alternating the colors of the paper background, the color proportions change each time you cut out the end of the month. This slight change will change the look of the interior a little bit every month. It can be mounted on the wall or on a tabletop, and there is plenty of writing space, so it is highly functional. The design that blends in with the interior is recommended for remote work.