Holidays at 13 september of 2019 (date 13.09.2019)
Day programmer — professional holiday programmers, celebrated on the 256th day of the year. The number 256 (28) is chosen because it is the number of different values that can be expressed using the eight-bit byte. And also this is the maximum a power of 2 which is less than 365 (days per year).
September 13 celebrate their professional holiday of people in whose hands the scissors and comb are magic wands. According to other data the holiday is celebrated on 14 September. In this case, 13 and 14 start to finish.