Billions of years ago

16 billion years ago

The age of the universe was given in VOY: "Good Shepherd" as sixteen billion years, which was the estimated age during the filming of the episode. Current real-world scientific evidence indicates the age of the universe to be 13.799 ± 0.021 billion years.
According to an okudagram from TNG: "The Royale", showing data about planet Theta VIII, its age was "7.2e10×1010 solar years", i.e., 72 billion years old.

9 billion years ago

5 billion years ago

4.5 billion years ago

4 billion years ago

3.5 billion years ago

According to current real-world science, there is evidence that suggests life took hold on Earth already between 3.8 and 4.1 billion years ago [1] and flourished in the oceans by at least 3.7 billion years ago. [2]

2 billion years ago

  • Civilization on Tagus III exists as of this time. According to Q, they "really knew how to party back in those days". (TNG: "Qpid")
It was not elaborated whether this civilization was already Taguan or some preceding species.

1 billion years ago

  • The Slaver Empire is the master of all intelligent beings in the Milky Way Galaxy. The Slavers and all of their subjects are exterminated in a massive war which caused all intelligent life to re-evolve. (TAS: "The Slaver Weapon")

Millions of years ago

400 million years ago

According to real-word science, Eryops lived some hundred million years later during the Permian period.

300 million years ago

87 million years ago

65 million years ago

  • A mass extinction occurs at the end of the Cretaceous period on Earth when an asteroid impacts the planet, wiping out the dominant reptile superorder, the dinosaurs, among others. (VOY: "Distant Origin"; ENT: "Azati Prime")
  • According to the Distant Origin Theory, some of Earth's dinosaurs belonging to the hadrosaur genus survive the mass extinction. Although the dominant reptile superorder was almost wiped out, these surviving dinosaurs continue to develop, likely on a secluded, later destroyed landmass. Sometime thereafter, they possibly become one of the first interstellar species in the galaxy when they leave Earth and travel to the Delta Quadrant, laying the foundation for the Voth civilization. (VOY: "Distant Origin")
While Dr. Forra Gegen suggests this hypothesis for the origin of the Voth, Chakotay later theorizes that the Voth's ancestors left before the extinction event, the impending catastrophe being what motivated them to do so in the first place.

50 million years ago

20 million years ago

  • Now considering themselves a race indigenous to the Delta Quadrant, the recorded history and identity of the Voth dates back to around this time. (VOY: "Distant Origin", "Friendship One")

10 million years ago

5 million to 2.5 million years ago

1 million years ago


Ayelborne said that his people had evolved beyond the need for physical bodies "millions of years ago."

Hundreds of thousands of years ago

  • A Sphere-shaped lifeform that died in the mid-23rd century dates back to this era. It records everything it sees and experiences starting around this time as well, including data on countless civilizations (DIS: "Project Daedalus")
In "An Obol for Charon", initial scans suggest the sphere is only one hundred thousand years old, but this seems to have been revised to hundreds of thousands years by Project Daedalus.

600,000 years ago

500,000 years ago

While the emergence of language among Humans cannot be exactly dated, Humanity had begun to use stone tools already 2.6 million years ago according to real-world science.
According to Star Trek: Star Charts, p. 34, the Talosians become warp-capable.

200,000 years ago

Star Trek: Destiny presents a different point of origin for the Borg.

100,000 years ago

Tens of thousands of years ago

50,000 years ago

45,000 years ago

  • Around 42,600 BC, extraterrestrial visitors, known as the "Sky Spirits", visit a people on Earth who become the indigenous inhabitants of South America. (VOY: "Tattoo")

30,000 years ago

28,000 years ago

25,000 years ago

  • The stone tablet city in Bajor is abandoned, sediments bury the ruins, and eventually the ancient city of B'hala is built on top. (DS9: "The Reckoning")

22,000 years ago

20,000 years ago

Circa 17,627 BC to 17,600 BC

12,000 years ago

10,000 years ago

In "The Dogs of War", Weyoun 8 euphorically claims that "the Dominion hasn't surrendered in battle since it was founded ten thousand years ago." This seems to contradict Weyoun 4 in "To the Death", who states "The Dominion has endured for two thousand years [...]."
In DS9: "Little Green Men", Nog states that it "took [ten thousand years] to establish the Ferengi Alliance", which implies it dates back to 8000 BC or earlier. This might also imply that Gint, the first Grand Nagus and original author of the Rules of Acquisition lived at this time, if he is considered the founder of the Alliance.


Duana stated that this was "hundreds of centuries ago."

Thousands of years ago

9,000 years ago

6,000 years ago

circa 4000 BC
Unknown aliens remove several Humans from Earth to be eugenically bred on a distant planet, lest Humanity destroy itself in its early technological age. Gary Seven, Agent 201 and Agent 347 will be among their descendants. (TOS: "Assignment: Earth")
3834 BC
Akharin is born in Mesopotamia on Earth. A soldier felled in battle, he soon realizes that no injury can kill him. He goes on through many aliases, becoming the immortal known as Flint. (TOS: "Requiem for Methuselah")
circa 3733 BC
Landru of Beta III preaches peace and coexistence among his people, ending a period of savagery. He creates a powerful computer to guide and protect his people after his death. (TOS: "The Return of the Archons")

5,000 years ago

circa 2700 BC
Earth is visited by aliens who settle in the region near Greece and the Mediterranean, where they are worshiped by the Greeks as gods. (TOS: "Who Mourns for Adonais?")
The Star Trek Encyclopedia (4th ed., vol. 1, p. 125) dated this event to around the year 3000 BC.
Sarpeidon experiences an ice age. Zarabeth is later exiled to this time period, and Spock and Leonard McCoy are briefly stranded here as well. (TOS: "All Our Yesterdays")
By this time, Vulcans are still barbaric, war-like and "nearly killing themselves off with their own passions". (TOS: "All Our Yesterdays")
circa 2600 BC
The Egyptians build the pyramids of Giza. They are observed by anthropologists from the future (specifically, the year 2769). (ENT: "Cold Front")
A battle warm-up is developed, that according to legend, "makes the heart a friend to the hand." (DS9: "Rivals")
circa 2500 BC
Vulcans begin to mentally train themselves to suppress their emotions. (VOY: "Random Thoughts")
Humans develop currency. (DS9: "Little Green Men")

4,000 years ago

circa 1800 BC
The Xindi-Avians build a concealed fortress on a planet that will one day become the home of the Xindi Council. (ENT: "The Council")
circa 1735 BC
According to Spock, this is when Humans begin to glorify organized violence. (TOS: "Dagger of the Mind")
Humans on Earth begin the tradition of confining law-breakers to prisons. (TOS: "Dagger of the Mind")
According to the Star Trek Encyclopedia (4th ed., vol. 2, p. 103), the Olmec civilization begins in Mexico in ca. 1500 BC.

3,000 – 2,000 years ago

circa 950 BC
Flint claims to live the life of King Solomon on Earth. (TOS: "Requiem for Methuselah")
circa 850 BC
The Vulcan monastery on P'Jem is built. (ENT: "The Andorian Incident")
The Star Trek Encyclopedia (4th ed., vol. 2, p. 119) dated this event to around 800 BCE.
circa 730 BC
The Kalandan outpost planet, "a few thousand years old" in 2268, may be constructed around this time. (TOS: "That Which Survives")
circa 630 BC
The Bajoran prophet Trakor first encounters the Orb of Prophecy and Change, and writes a series of prophecies concerning the Emissary of the Prophets. (DS9: "Destiny")
circa 525 BC
Aeschylus is born in Greece. (DIS: "The Sound of Thunder")
480 BC
The Battle of Thermopylae is fought on Earth between the Spartans and the Persians. (DS9: "What You Leave Behind")
circa 400 BC
Survivors from the Sahndara system supernova arrive on Earth. Their sojourn coincides with the time of the philosophers Socrates and Plato. "After the death of the Greek civilization they idolized" they move on to the planet Platonius. (TOS: "Plato's Stepchildren")
While the Platonians state that they were on Earth during the time of Plato, this is later contradicted by giving their dates of birth occurring hundreds of years later (circa 30BC) well after Greece had fallen to the Roman Empire. It is unknown if this was an accidental error in the plot or if the Platonians might have only studied Plato while on Earth.
356-323 BC
Flint lives the life of Alexander the Great on Earth. (TOS: "Requiem for Methuselah")
280 BC
The Lighthouse of Alexandria is built under Ptolemy II. (VOY: "11:59")
214 BC
Construction begins on the Great Wall of China on Earth. (VOY: "11:59")
120 BC
Hipparchus dies. (VOY: "Future's End")
44 BC
Parmen, future leader of the Sahndaran refugee community, is born on Sahndara. (TOS: "Plato's Stepchildren")
circa 40s BC
The spherical lifeform records data on Kaminar, indicating that a significant portion of Kelpiens have passed Vahar'ai to reach a more evolved state. (DIS: "The Sound of Thunder")
32 BC
Philana, future wife of Parmen, is born on Sahndara. (TOS: "Plato's Stepchildren")
3 BC
Philana, now 30, stops aging. (TOS: "Plato's Stepchildren")

Background information

The following events are from the fourth edition of the Star Trek Encyclopedia (vol. 1, pp.. 109, 143; vol. 2, pp. 103, 171, 395):

  • In 5th century Asia, Buddha founds the nontheistic religion of Buddhism.
  • Socrates is born in 469.
  • Plato is born in circa 428.
  • The Olmec civilization of Mexico ends in about 400.
  • Socrates dies in 399.
  • Plato dies in circa 348.
  • Cicero is born in 106.
  • Cicero dies in 43.

Indeterminate past

This is said to have begun "several thousand years ago".
This is said to have begun "thousands of years ago".
This is said to have occurred a millennia ago.
Dawn of time Timeline 1st century

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