Mechanical Engineer's Day is observed in Russia, Belarus, Kazakhstan, and Kyrgyzstan on the last Sunday in September. Established in 1981 by the presidium of the Supreme Soviet of the USSR, this professional holiday honors the significant contributions of mechanical engineers to the development of the industry, which was a crucial part of the Soviet economy. While some former Soviet republics have abolished the holiday or moved it to different dates, the aforementioned countries continue to celebrate it annually. Celebratory activities typically take place at machine-building plants and universities and colleges of mechanical engineering, recognizing the vital role these specialists play in the field.