![Pi socks [Digital]](https://nicolor.de/wp-content/uploads/IMG_2483_800oL.jpg)
![Pi socks [Digital] - Image 2](https://nicolor.de/wp-content/uploads/IMG_2486_800oL.jpg)
Pi Day is an annual celebration of the mathematical constant π. It is observed on March 14 (the 3rd month) since 3, 1, and 4 are the first three significant figures of pi, and was first celebrated in the United States in 1988.
Pi is a special number that describes how many times the diameter of a circle fits into its circumference – about 3.14 times.
I need pi quite often, e.g. to calculate necklines.
And now also for striped socks.
![Vinahóp [Digital]](https://nicolor.de/wp-content/uploads/IMG_5719_800oL-600x600.jpg)
![Longitudinal [Digital]](https://nicolor.de/wp-content/uploads/Longitudinal_4333_web-600x600.jpg)
![Hattu [Digital]](https://nicolor.de/wp-content/uploads/Nicolor_Hattu_7634-600x600.jpg)
![Caterpillar [Digital]](https://nicolor.de/wp-content/uploads/IMG_5593_800_oL-600x600.jpg)
![Jogging [Digital]](https://nicolor.de/wp-content/uploads/IMG_6536_800oL-600x600.jpg)