This timeline covers events in the Star Trek Universe through the 20th century.

1920s[]

Title	Series	Date	Media	Notes	Image
Strange New Worlds V The Peacemakers Section 6	The Next Generation	19 June 1929	short story

1930s[]

Title	Series	Date	Media	Notes	Image
The City on the Edge of Forever 1930 time-travel scenes	The Original Series	1930	episode
Crucible The Star to Every Wandering (Timeline 1) Chapter 8, Terminus: Crucible	The Original Series	1930	novel	Runs concurrently with 1930 time-travel scenes from TV episode.
Crucible The Fire and the Rose (Timeline 1) Chapter 6, Section 1; Chapters 8, 11, 13, 15, 17, Intersection: Crucible	The Original Series	1930	novel	Runs concurrently with 1930 time-travel scenes from TV episode.
Crucible Provenance of Shadows (Timeline 2) Overture, Chapters 2, 4, 6, 8, 10	The Original Series	1930	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Strange New Worlds III Triptych Chapters 1, 2 & 3	The Original Series	1930	short story
Strange New Worlds 9 Remembering the Future Sections 2-7	Speculations	1930	short story
Strange New Worlds V Disappearance on 21st Street	The Original Series	1930	short story
Crucible Provenance of Shadows (Timeline 2) Chapter 12; Chapter 13, Section 1	The Original Series	1931	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Crucible Provenance of Shadows (Timeline 2) Chapter 13, Section 2; Chapters 15, 17, 19, 21, 23, 25, 27	The Original Series	1932	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Crucible Provenance of Shadows (Timeline 2) Chapter 28; Chapter 30, Section 1	The Original Series	1934	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Crucible Provenance of Shadows (Timeline 2) Chapter 30, Section 2	The Original Series	1936	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Crucible Provenance of Shadows (Timeline 2) Chapters 32, 34	The Original Series	1937	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Strange New Worlds IV Captain Proton and the Orb of Bajor	Deep Space Nine	28 October 1938	short story
The Amazing Stories The Space Vortex of Doom	Voyager	1939	short story
Captain Proton: Defender of the Earth	Voyager	1939	novel
Strange New Worlds V The Difficulties of Being Evil	Voyager	1939	short story
Star Trek: Explorer Kill Captain Proton!	Voyager	1939	short story

1940s[]

Title	Series	Date	Media	Notes	Image
Far Beyond the Stars Chapters 10, 13, 16, 17, 24, 26 & 32-35	Deep Space Nine	July 1940	episode novelization
Crucible Provenance of Shadows (Timeline 2) Chapters 36, 38	The Original Series	1941	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Home Is the Hunter Chapters 5, 9, 12, 17, 23, 26, 31, 37 & 40	The Original Series	October 1942	novel
Enterprise Logs World of Strangers	Star Trek	26 October 1942	short story
Home Is the Hunter Chapters 43, 47 & 50	The Original Series	November 1942	novel
Storm Front	Enterprise	1944	episode	In an alternate timeline the crew of Enterprise (NX-01) battle at the front lines of the Temporal Cold War.
Crucible Provenance of Shadows (Timeline 2) Chapter 40	The Original Series	1944	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Trapped in Time Chapters 4-11	Deep Space Nine	1-3 June 1944	novel
Crucible Provenance of Shadows (Timeline 2) Chapter 42	The Original Series	1946	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Little Green Men (past)	Deep Space Nine	July 1947	episode
From History's Shadow Chapters 3-4	The Original Series	23 September to 15 October, 1947	novel
Crucible Provenance of Shadows (Timeline 2) Chapter 44	The Original Series	1948	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.
Crucible Provenance of Shadows (Timeline 2) Chapter 46, Section 1	The Original Series	1949	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930.

1950s[]

Title	Series	Date	Media	Notes	Image
Elusive Salvation Chapters 8-9	The Original Series	September 13-14, 1951	novel
Star Trek: Special When the Stars Come a-Calling	Deep Space Nine	1953	comic
Far Beyond the Stars Chapters 5, 8, 9, 11, 12, 14, 15, 18, 19, 21, 23, 27-29, 31, 36 & 37	Deep Space Nine	October 1953	episode novelization
Strange New Worlds IV Isolation Ward 4	Deep Space Nine	14 December 1953 - 2 April 1954	short story
Crucible Provenance of Shadows (Timeline 2) Chapter 48, Chapter 50; Chapter 52, Section 1	The Original Series	1954	novel	Alternate-timetrack history: Nazi Germany drops atomic bombs on U.S. cities, following survival of Edith Keeler.
From History's Shadow Chapter 10	The Original Series	14 January 1955	novel
A Bomb in Time Kirk's time travel	The Original Series	3 April 1955	comic
Crucible Provenance of Shadows (Timeline 2) Chapter 52, Section 2	The Original Series	1955	novel	Alternate-timetrack history of what would have occurred on Earth, had Dr. McCoy prevented Edith Keeler's death in 1930. McCoy killed by invading Nazi soldier.
Carbon Creek (Past)	Enterprise	October to December 1957	episode
From History's Shadow Chapters 13-15	The Original Series	November 10 to November 11, 1957	novel
Strange New Worlds 2016 The Dreamer and the Dream Past Events	Deep Space Nine	March 3 to April 9 1959	novel	Benny Russell has decided to write his final DS9 story.

1960s[]

Title	Series	Date	Media	Notes	Image
Future's End prologue	Voyager	11 July, 1967	episode	Henry Starling witnesses the crash landing of the USS Aeon.
From History's Shadow Chapter 24	The Original Series	17 July, 1967	novel
Star Trek: The New Voyages Visit to a Weird Planet Revisited "studio" sections	The Original Series	1968	short story
Strange New Worlds IV Isolation Ward 4 final entry	Deep Space Nine	4 April, 1968	short story
Department of Temporal Investigations Forgotten History Chapter 2, Section 2	Star Trek	4 April, 1968	novel	The Enterprise arrives in the year 1968 from the future year of 2268.
Assignment: Earth 1968 time-travel scenes	The Original Series	4 April, 1968	episode
From History's Shadow chapters 26, 28-32	The Original Series	23 February to 22 April 1968	novel
Assignment: Earth Brighter Than a Thousand Suns	The Original Series	July 1968	comic	set three months after "Assignment: Earth."
Assignment: Earth Yesterday, Today and Tomorrow	The Original Series	July 1969	comic	takes place concurrently with "Tomorrow is Yesterday", beginning moments before the episode.
Tomorrow is Yesterday (past)	The Original Series	July 1969	episode
Strange New Worlds III The Aliens Are Coming!	The Original Series	July 1969	short story/eBook
From History's Shadow Chapters 35-26	The Original Series	10 July 1969	novel
Assignment: Eternity Chapters 1 & 22	The Original Series	19-20 July 1969	novel

1970s[]

Title	Series	Date	Media	Notes	Image
Assignment: Earth My Name Is Legion	The Original Series	1970	comic
Star Trek (IDW) Lost Apollo, Part 1 1970 flashbacks	The Original Series	1970	comic	Events take place in an alternate reality.
Elusive Salvation Chapter 11	The Original Series	20 November 1970	novel
Leonard McCoy, Frontier Doctor Medics 1970 flashback	The Original Series	21 December 1970	comic	Aegis assigns Gary Seven to investigate Alpha Tau IV. (Date cited in "Hosts")
Elusive Salvation Chapters 12-14	The Original Series	May 21-26, 1971	novel
Strange New Worlds 10 Time Line	The Original Series	some weeks after September 1971	Short story	Some details contradict information given in e.g. Assignment: Earth.
Star Trek: Khan Khan, Issue 1 1971 flashback	The Original Series	November 1971	comic	Depicts the childhood of Khan Noonien Singh in India, and his history with the Chrysalis Project. Events take place in an alternate reality.
New Visions 1971/4860.2 1971 sections	The Original Series	24 November 1971	comic	James T. Kirk time travels to Earth to prevent the emergence of an alternate reality.
Assignment: Earth We Have Met the Enemy...	The Original Series	1971	comic	Takes place three-and-a-half years after "Assignment: Earth."
Assignment: Earth Isis	The Original Series	c. 1971	comic	Short comic published in We Have Met the Enemy..., and presumed to take place at a similar time.
Star Trek: Khan Khan, Issue 1 1972 flashback	The Original Series	January 1972	comic	Depicts the childhood of Khan Noonien Singh in India, and his history with the Chrysalis Project. Events take place in an alternate reality.
Assignment: Earth Too Many Presidents Pages 1-18	The Original Series	February 1972	comic
Star Trek: Khan Khan, Issue 1 1972 flashback	The Original Series	September 1972	comic	Continues flashbacks from this year. Events take place in an alternate reality.
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 1 Chapters 1-23	The Original Series	13 March - 19 May 1974	novel
Assignment: Earth Too Many Presidents Page 19	The Original Series	August 1974	comic
Assignment: Earth Ah-Ha!	The Original Series	c. 1974	comic	Short comic published in Too Many Presidents and presumed to take place shortly after the conclusion.

1980s[]

Title	Series	Date	Media	Notes	Image
US Comic Strips Getting Real	The Original Series	1983	comic	Depicts time travel mission to 1983. Events take place in an alternate timeline, with references made to events of the prime reality.
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 1 Chapters 26-27 & 29-30	The Original Series	1 November - 3 December 1984	novel
Star Trek IV: The Voyage Home Chapters 5-12 (Past)	The Original Series	June 25-27, 1986	movie novelization	Dating of HMS Bounty's arrival in 20th century established in TOS novel Elusive Salvation.
Elusive Salvation "One Last Thing": Chapter 32	The Original Series	June 25, 1986	novel	Roberta Lincoln is alerted to arrival of Admiral Kirk's stolen Klingon Blird-of-Prey in the year 1986.
Strange New Worlds VI Whales Weep Not	The Original Series	1986	short story
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 1 Chapters 31-33	The Original Series	July 5 - October 10, 1986	novel
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 1 Chapters 34	The Original Series	9 November 1989	novel

1990s[]

Title	Series	Date	Media	Notes	Image
Strange New Worlds I The Man Who Sold the Sky	The Original Series	1991	short story
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapters 1-4	The Original Series	14 June - 6 November 1992	novel
Star Trek: Khan Khan, Issue 2 1992 flashbacks	The Original Series	September-October 1992	comic	Nuclear attacks upon Washington, DC and Moscow by Khan Noonien Singh and the other Eugenic Augments utterly destroy both cities. The Augments seize control of over forty nations. Events take place in an alternate reality.
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapters 5, 6 & 8-11	The Original Series	15 March - 1 October 1993	novel
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapters 12-20	The Original Series	7 February - 14 November 1994	novel
Strange New Worlds 9 The Rules of War	The Original Series	1994	short story
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapter 21	The Original Series	17 March 1995	novel
Ghost Ship Chapter 1	The Next Generation	24 April 1995	novel
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapters 22-23	The Original Series	7 September 1995	novel
The Eugenics Wars The Rise and Fall of Khan Noonien Singh, Volume 2 Chapters 24-27	The Original Series	5 January - 2 February 1996	novel
Star Trek: Khan Khan, Issue 3 1996 flashbacks	The Original Series	7 May 1996	comic	Flashback to the end of the Augment Alliance and Khan Noonien Singh's escape from Earth aboard the SS Botany Bay. Events take place in an alternate reality.
Federation: The First 150 Years Prologue: Cochrane's Flight, 2063-2120	Star Trek	1996	reference book	Newspaper article covering the launch of the SS Botany Bay, and the escape of Khan's Augment group.
Last Unicorn RPG The Danurian Factor Introduction	The Original Series	1996	role-playing game	Takes place shortly after the launch of the Botany Bay.
Future's End 1996 time-travel scenes	Voyager	November 1996	episode
Strange New Worlds II Almost... But Not Quite Sections 3-5	Voyager	November 1996	short story
From History's Shadow Chapter 38	The Original Series	November 6, 1996	novel
Elusive Salvation "One More Last Thing": Chapter 33	The Original Series	7 November 1996	novel	Top-secret organization Section 31 is created by Pentagon officers in Washington, D.C.
Strange New Worlds 2016 Life Among the Post-Industrial Barbarians	Voyager	1997	short story
Strange New Worlds II Research	Deep Space Nine	1998	short story
Second Contact	The Next Generation	1998	Comic
Alien Voices Spock vs. Q	Star Trek	1999	audiobook
Alien Voices Spock vs. Q: The Sequel	Star Trek	1999	audiobook
11:59 (Flashbacks)	Voyager	December 1999	episode

Connections[]