The death of Ronald Ross (British biologist and Nobel laureate) on September 16, 1932, marks a significant moment in the history of medical science. Born in 1857, Ronald Ross dedicated much of his career to the study of malaria. He was the first to discover the transmission cycle of the malaria parasite by the Anopheles mosquito, a breakthrough that profoundly influenced global efforts to control and prevent the disease. In 1902, Ross was awarded the Nobel Prize in Physiology or Medicine for his research on malaria. His findings led to the development of new strategies for combating malaria in various regions, saving millions of lives. Ross also published numerous articles and books on medicine and public health, playing a key role in advancing medical knowledge. The death of Ross on September 16, 1932, marked the end of the life of a prominent figure in medical science. His legacy and achievements continue to be recognized in research and education. The inclusion of this event in the Gregorian calendar was made in 1932 to acknowledge the global importance of Ross's achievements and their lasting impact on public health.