1903 – Born in Chicago, Illinois on the 13th of August.
1916-1922 – Cozzens attended the Episcopal Kent School in Connecticut and after graduation went to Harvard University for two years.
1924 – He published his first novel, Confusion.
1928-1929 – He began to write short stories, and where he gathered material which eventually became Cock Pit and The Son of Perdition.
1927 – He met Sylvia Bernice Baumgarten, a literary agent with Brandt and Kirkpatrick whom he married in December and who successfully edited and marketed his books.
1931 – Cozzens received O. Henry Awards for his short stories "A Farewell to Cuba" and "Total Stranger.
1941 – Ask Me Tomorrow.
1942 – The Just and the Unjust.
1948 – the novel Guard of Honor, won the Pulitzer Prize.
1957 – His novel By Love Possessed became a surprise runaway hit, with 34 weeks on The New York Times Best Seller list, reaching Number One on the 22nd of September, three weeks after its release.
– He broke with his long-standing penchant for privacy and granted Time magazine an interview over the objections of his wife as the basis for its cover article of September 2nd, marking the release of By Love Possessed, for which Cozzens had been nominated for a second Pulitzer.
1958 – He relocated to another country home near Williamstown, Massachusetts.
1960-1966 – Cozzens was on the Harvard Board of Overseers’ Visiting Committee for the English Department.
– He also became a symbol of "The Establishment" and the antithesis of the growing counterculture because his works negatively portrayed or lampooned those against authority and "the system".
1968 – His last novel, Morning, Noon and Night, was published but sold poorly.
1978 – Died on the 8th of August.