A. J. Cronin, Scottish physician and author (born 1896)

Archibald Joseph Cronin (Cronogue) (19 July 1896 – 6 January 1981) was a Scottish physician and novelist. His best-known novel is The Citadel (1937), about a Scottish physician who serves in a Welsh mining village before achieving success in London, where he becomes disillusioned about the venality and incompetence of some doctors. Cronin knew both areas, as a medical inspector of mines and as a physician in Harley Street. The book exposed unfairness and malpractice in British medicine and helped to inspire the National Health Service.

January 6 is the sixth day of the year in the Gregorian calendar; 359 days remain until the end of the year.