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.