The date of this event is unique each year. In 2024, the date is September 12. Programmer's Day has been celebrated in Russia since 2009. This professional holiday was established by a decree of the President of the Russian Federation and is observed on the 256th day of the year — September 13, or September 12 in leap years. The number 256 was chosen because it represents the total number of values that can be expressed with an 8-bit byte, and it is also the highest power of 2 that is less than the number of days in a year — 365. A programmer is a specialist engaged in the development of software (SW) for personal, embedded, industrial, and other types of computers — in other words, programming. Often, the word "programming" and everything associated with it is thought of by the average person as only related to personal computers. However, this is not the case. Virtually every electronic device — from remote controls to complex industrial machines with programmed control — has passed through the hands of programming specialists at some point. We encounter the fruits of a programmer’s labor every hour. Whether we watch television, listen to the radio, or talk on the phone, we are using what a programmer has created. Industry, medicine, culture, education — all fields use electronic devices. This is perhaps one of the few professions that covers such a wide range of human activities. The significance of the programmer's profession in everyday life is hard to overestimate. This type of work is becoming increasingly widespread, while also symbolizing the vanguard of modern society.