Thai Technology Day is observed in Thailand every October 19 to commemorate the contributions of King Bhumibol Adulyadej to the country’s technological development. Established in 2000, the day marks the anniversary of the king's demonstration of artificial rainmaking technology in 1972 at the Kaeng Krachan Dam. King Bhumibol, who received the title “Father of Thai Technology,” was deeply involved in various development projects, particularly the Thailand Royal Rainmaking Project aimed at alleviating drought impacts on agriculture. The holiday features technological exhibitions, fairs, conferences, and activities organized by government agencies, educational institutions, and tech companies. It highlights the king's legacy in science and technology, including his numerous patents for inventions.