The Day of Inventors and Innovators, also known as the Day of Inventors and Rationalizers, is observed in Russia and Belarus every last Saturday of June. This professional holiday was first established in the Soviet Union in 1957 by the Academy of Sciences of the USSR and gained national status in 1979. It recognizes the contributions of inventors and innovators to the development of science and the economy. Celebrations typically include official events such as awards ceremonies where outstanding innovators and inventors are honored with medals, honorary titles, and valuable prizes. Despite some republics abolishing or renaming the holiday after the dissolution of the Soviet Union, Russia and Belarus continue to commemorate this day, emphasizing its importance in fostering innovation and recognizing achievements in these fields.