There are a lot of calendar design in the market but we found that this version by Sebastian Bergne is the one with the most unique twist. It is nothing but a wood with jagged top, and a star-like ball topping the jag. According to Bergne, the star can be positioned on on the serrated side of the ruler. The wood ruler will show the date and the star will show you the day.
Obviously, the ruler is also a “ruler”. But if you are hoping to see what holidays you’ve got in the particular month, sadly, you will never know about them with this monthly measure calendar and ruler.