1925	Harry Max Harrison is born 12th March in Stamford, Connecticut, the only child of Ria and Henry Leo Harrison.
1927	The family moves to Brooklyn, New York.
1930	The family moves to Queens, New York.
1938	Harry Harrison becomes a Charter Member of the Queens Chapter of the Science Fiction League.
1943	Graduates from Forest Hills High School. Attends the Eastern Aircraft Instrument School in New Jersey and becomes a certified aircraft instrument mechanic. Drafted into the U.S. Army Air Corps, he is sent to Keesler Field, Mississippi for basic training, then to Lowry Field in Denver, Colorado, where he is trained as a power-operated turret and computing gunsight specialist.
1944	Sent to the Air Corps base in Laredo, Texas, where he maintains gunsight computers and acts as armourer, gunnery instructor and truck driver.
1945	Transferred to the gunnery school in Panama City, Florida. When the school is closed, Harrison is promoted to sergeant and transferred to Military Police duties.
1946-1948	Discharged from the army in February, Harrison works briefly as an hydraulic press operator. Then at the start of the Fall term he begins an art course at Hunter College in New York City, and becomes a student of noted American painter John Blomshield. Harrison leaves the class, but continues to study privately under Blomshield for the next two years. At the same time, he attends the Cartoonists and Illustrators School.
1948-1955	Teams up with Wally Wood whilst at the Cartoonists and Illustrators School, and they begin to produce comics and freelance commercial illustration work. From around 1948 onwards, Harrison also begins to sell freelance written articles to magazines.
1950	Chairs Hydracon on 4th July in New York: the first professional science fiction writers' convention. Illustrates the first two issues of Worlds Beyond for Damon Knight: illness prevents him from illustrating the third, and drives him to the typewriter to write his first story.
1951	"Rock Diver", his first science fiction story, appears in the August edition of Worlds Beyond.
1952	Moves into editing, packaging and publishing comics, often writing and/or illustrating entire issues.
1953	As the comics boom comes to an end, Harrison moves into editing pulp magazines. He writes short articles and "true confessions" for magazines.
1954	Marries Joan Marian Merkler, 4th June.
1955	Birth of son, Todd, 21st May. Begins writing The Saint comic strips, and continues until the strip ends in 1960.
1956	Harrison becomes a full-time freelance writer. Moves to Mexico, and begins work on his first novel, Deathworld.
1957	Moves to England. First Stainless Steel Rat short story published. Spends a short period writing Jeff Hawke comic scripts for Sidney Jordan in the Autumn, as well as SF comics for Fleetway.
1958	Moves to Italy. Begins to write Flash Gordon scripts for the revived comic strip drawn by Dan Barry. Continues to write these scripts for the next ten years. Returns to New York for the birth of his daughter.
1959	Birth of daughter, Moira, January 9th. Deathworld is completed and sold to John Campbell. Moves to Denmark in the Summer, where the Harrisons live for the next seven years. Begins work on Bill, the Galactic Hero.
1960	Deathworld published in Astounding.
1961	The Stainless Steel Rat is published in book form.
1962	Planet of the Damned and War With The Robots, Harrison's first short story collection, published.
1964	Founds SF Horizons - the first magazine of SF criticism - with Brian Aldiss. Vendetta For The Saint published under the name of Leslie Charteris. Deathworld 2 published.
1965	Bill, the Galactic Hero is finally published, following difficulties in trying to get editors to accept its blend of SF and satire. Moves to England. Two Tales and Eight Tomorrows published.
1966	Make Room! Make Room! and Plague From Space published.
1967	Moves to San Diego, California. The Technicolor Time Machine is published.
1968	Edits the first of nine volumes of the Year's Best SF with Brian Aldiss, the anthology is published annually until 1976. Deathworld 3 published.
1969	Captive Universe published, and chosen as the Book-of-the-Month Club selection for April. Prime Number published.
1970	In Our Hands The Stars; One Step From Earth; and The Stainless Steel Rat's Revenge published.
1972	The Stainless Steel Rat Saves the World; A Transatlantic Tunnel, Hurrah!; Stonehenge; and Montezuma's Revenge published.
1973	Soylent Green is released: the film wins Harry Harrison and the film's screenwriter the Nebula Award, presented by the Science Fiction Writers of America, for the Best Dramatic Presentation. Star Smashers of the Galaxy Rangers published.
1974	Returns to London. Queen Victoria's Revenge published.
1975	Takes up residence in the Republic of Ireland.
1976	Organises the first International Science Fiction Authors Conference which is held in Dublin. Lifeship; Skyfall and The Best of Harry Harrison published.
1977	Elected president of World SF. Great Balls of Fire published.
1978	The Stainless Steel Rat Wants You published.
1979	Planet Story published.
1980	Homeworld and The QEII Is Missing published.
1981	Planet of No Return; Wheelworld and Starworld published.
1982	Invasion: Earth; The Jupiter Plague and The Stainless Steel Rat For President published.
1983	Rebel In Time and Stonehenge: Where Atlantis Died published.
1984	West of Eden published.
1985	A Stainless Steel Rat is Born and You Can Be The Stainless Steel Rat, an interactive game book, published. Harry Harrison becomes an Honorary Patron of the Universal Esperanto Association.
1986	Winter in Eden published. Harry Harrison is Guest of Honour at Windycon XIII in Chicago.
1987	The Stainless Steel Rat Gets Drafted published. Harrison attends the International SF Authors' Convention in Moscow.
1988	Return to Eden published.
1989	Bill, the Galactic Hero on The Planet of Robot Slaves published. Harry Harrison by Leon Stover published in Twayne's United States Authors series, the first critical study of Harrison's works.
1990	Guest of Honour at the 48th World Science Fiction Conference in The Hague. Bill, the Galactic Hero on The Planet of Bottled Brains published.
1991	Bill, the Galactic Hero on The Planet of Tasteless Pleasure; Bill, the Galactic Hero on The Planet of Ten Thousand Bars; Bill, the Galactic Hero: the Final Incoherent Adventure and There Won't Be War published.
1992	The Turing Option published
1993	Stainless Steel Visions and The Hammer and the Cross published.
1994	The Stainless Steel Rat Sings the Blues and Galactic Dreams published.
1995	One King's Way published.
1996	King and Emperor and The Stainless Steel Rat Goes to Hell published.
1997	Harry Harrison is Guest of Honour at the European Science Fiction convention in Dublin.
1998	Stars and Stripes Forever published.
1999	Official Harry Harrison website launched. The Stainless Steel Rat Joins the Circus published. Stars and Stripes in Peril completed.
2000	Harry is Guest of Honour at Mecon, in Belfast, Northern Ireland, on his 75th birthday. Stars and Stripes in Peril published. Stars and Stripes Triumphant to be completed, for publication late 2000 or early 2001. The Stainless Steel Rat movie is announced. Harry is a guest at Chicon 2000.