📅 20 Augustus 1897
While working in British-ruled India, he observed pigmented structures in the dissected mosquito.
📅 20 Augustus 1897
The discovery helped establish the role of mosquitoes in malaria transmission; the full life cycle was clarified through later work.
📅 20 Augustus 1897
The date later became World Mosquito Day, commemorating a result reached in India rather than Britain.
📅 20 Augustus 1897
The work depended on Indian settings, patients and assistants, although standard retellings often focus almost entirely on Ross.
