April 18

Invention Day is celebrated in Japan on April 18 to honor the promulgation of the first Patent Monopoly Act in 1885 and to foster creativity and technological development. Established by the Ministry of Commerce and Industry in 1923, the day encourages inventors, engineers, and entrepreneurs to share new ideas. Events include exhibitions of patent models, seminars on intellectual property rights, and award ceremonies recognizing groundbreaking inventions. Schools and universities organize competitions and workshops to inspire the next generation of innovators. The observance underscores the importance of innovation in driving economic growth and societal progress.

World Amateur Radio Day, established by the International Amateur Radio Union (IARU) in 1925, is observed on April 18—the anniversary of IARU’s founding. The day highlights the role of amateur radio operators in facilitating global communication, public service, and disaster response. Clubs and enthusiasts host on-air events, contests, and open house demonstrations to showcase radio technologies. Workshops and lectures cover topics like propagation, digital modes, and emergency preparedness. The observance fosters international goodwill and inspires new generations to explore the science and community of amateur radio.