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25th century

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Multiple realities
(covers information from several alternate timelines)

The 25th century is defined in the calendar of Earth as being from 2401 until 2500.


The game Star Trek Online is set in 2409 and 2410.

Alternate timeline events

The following events took place in an alternate timeline in which Alexander Rozhenko chose to never become a Klingon warrior. (TNG: "Firstborn")

  • Worf is murdered on the floor of the Klingon High Council after his son, Alexander, becomes a peacemaker in the Empire.
  • 2410: Alexander travels back to 2370 in the hopes of convincing his past self to become a warrior, thus avoiding the death of his father.
It remains uncertain whether Alexander actually managed to alter history, although he does enlist in the Klingon Defense Force, as seen in DS9 Season 6.

The following events took place in an alternate timeline in which the USS Voyager did not enter the Borg transwarp conduit network and return to Earth in 2378. (VOY: "Endgame")

The following events took place in an alternate timeline in which Benjamin Sisko was displaced out of time. (DS9: "The Visitor")

24th century Timeline 26th century


25th century productions

Background notes

Going by Data's statement that the The energy ribbon from Star Trek Generations passes through the Milky Way Galaxy every 39.1 years, it can be expected to return in 2410, 2449, and 2488.


In the game Star Trek Online, Humans reached the Delta Quadrant in the year 2410, along with the Romulan Republic and the Klingon Empire, through the use of Dyson Spheres and Iconian Gateways. This contradicts the Q's prediction of Humans reaching the Delta Quadrant in 2472. This year also sees the Iconians return from exile in the Andromeda Galaxy and engage in a massive invasion of the Milky Way, forcing all the major powers of the galaxy to join together to fight them.

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