Sebastian Bergne has created a monthly universal calendar that's also a ruler.
Says Bergne, "The star can be positioned on the serrated side of the ruler, to show the day of the month and the date. The date can be easily changed by rolling the star along the ruler." The dates are placed every centimeter so Monthly Measure can also be used as a metric ruler.
Monthly Measure will be launched at Maison&Objet this weekend.