Unofficial Programmers’ Day is observed in Russia on April 22 every year. This date is celebrated by many Russian programmers who prefer it over the official Programmers’ Day, which falls on the 256th day of the year, due to its historical significance related to the occupational code for software development. The code 2204, which corresponds to April 22 in the dd/mm date format, is a reason why some "old school" programmers favor this date. The holiday highlights the contributions of Soviet and Russian computer scientists, such as Sergey Lebedev, who developed the first Soviet computers, and notable programmers like Eugene Kaspersky and Igor Sysoev. While the official day was established by President Dmitry Medvedev in 2009, the celebration of April 22 reflects the ongoing appreciation for the profession within the tech community in Russia.