This timeline covers events in the Star Trek universe in the 2250s decade.
| Memory Beta Chronology | ||||||||
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| Distant Past | Recent Past | 20th Century | 21st Century | 22nd Century | 23rd Century | 24th Century | 25th Century | Far Future |
| Memory Beta Chronology: 23rd Century | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2200s | 2210s | 2220s | 2230s | 2240s | 2250s | 2260s | 2270s | 2280s | 2290s |
2250[]
| Title | Series | Date | Media | Notes | Image |
| Star Trek IV Sourcebook Update Alien Races: Xaranites |
The Original Series | February 23, 2250 (Reference stardate 1/9302.23) | role-playing game | Galaxy Exploration Command vessel USS Clandre makes first contact with the Zaranite race in the Byrdica system, one year prior to the start of the Four Years War. |
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| Sarek Chapter 12 |
The Original Series | April 5, 2250 | novel | Amanda Grayson returns to Sarek after learning that Solkar has died |
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| The Entropy Effect Chapter 1 |
The Original Series | 2250 | novel |
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| Starfleet Academy! | The Original Series | 2250 | comic |
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| Starfleet Academy Aftershock |
The Original Series | 2250 | novel |
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| Which Way Books Voyage to Adventure time travel |
The Original Series | 2250 | novel |
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2251[]
| Title | Series | Date | Media | Notes | Image |
| Crew The Ends of Eternity Pages 1-7 & 22 |
The Original Series | c. 2251 | comic | This story is set three years into Number One's posting on the Enterprise, which was described in "Shadows of the Past" as having begun five years after her first mission aboard the ship, as depicted in "Shakedown." Given that "Shakedown" portrayed the shakedown cruise of the Enterprise, and this issue, eight years later, shows April still in command, it must be set near the end of April's captaincy, which concluded in 2251. |
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| Final Frontier "Hope and a Common Future" |
The Original Series | 2251 | novel |
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| Flesh of My Flesh Flashback |
Early Voyages | 2251 | comic | As the Ngultor probe Christopher Pike's mind, he recalls taking command of the Enterprise for the very first time. |
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| Starfleet Academy Cadet Kirk |
The Original Series | February 2251 | novel | Takes place a month before James T. Kirk's 18th birthday. |
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| All Those Years Ago... Flashback |
The Original Series | 2251 | comic |
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| New Visions Time Out of Joint Timeshift: Finnegan, Mitchell |
The Original Series | 2251 | comic |
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| Garth of Izar 2251 sections |
The Original Series | 2251 | novel | The Battle of Axanar takes place. |
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| The Four Years War The Planet Axanar |
The Original Series | 2251 (Reference stardate 1/94) | role-playing game | Chronicles the outbreak of hostilities between the UFP and the Klingon Empire, with attacks upon Archanis IV and Axanar. Starship USS Gulliver engages seven Klingon battlecruisers near the planet Axanar, and is destroyed. |
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| The Children of Kings | The Original Series | 2251 | novel | Takes place three months into the Enterprise's five-year mission under Pike. |
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| My Brother's Keeper Republic Chapters 5-20 |
The Original Series | 2251 | novel |
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2252[]
| Title | Series | Date | Media | Notes | Image |
| Fear Itself | Discovery | 2252 | novel |
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| A Choice of Catastrophes Chapter 9 - "Sixteen Years Ago" |
The Original Series | 2252 | novel |
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| Constellations Chaotic Response Sections 5 & 7 |
The Original Series | 2252 | short story |
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2253[]
| Title | Series | Date | Media | Notes | Image |
| Flesh of My Flesh 2253 Flashback |
Early Voyages | 2253 | comic | As the Ngultor probe Christopher Pike's mind, he recalls recruiting Spock to join the crew of the Enterprise two years into his command. |
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| Vulcan's Glory | The Original Series | 2253 | novel | Set during Spock's first mission on the Enterprise. The Pocket Books Timeline places this story a year earlier in 2252; however, this does not mesh with Spock joining the Enterprise two years into Pike's command, as specified in "Flesh of My Flesh," so it is placed later here. |
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| Spock: Reflections Spock: Reflections, Issue 2 Pages 10-17 |
The Original Series | 2253 | comic | Takes place not long after Spock's arrival aboard the Enterprise (as per Vulcan's Glory), with Captain Pike and his crew still attempting to know him better as a person. |
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| Demand of Honor | The Original Series | 2253 | role-playing game | During the Four Years War, a Klingon fleet is defeated at Donovan's Star by Andorian admiral Thelenth, at the cost of his own flagship. |
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| Alien Spotlight Vulcans |
The Original Series | 2253 | comic | Set very shortly after Spock transferred to the Enterprise under Pike. |
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| Shadows on the Sun Book Two |
The Original Series | 2253 | novel | Flashback to 2253: Jocelyn Treadway separates from Leonard McCoy. |
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| Planet of Judgment | The Original Series | 2253 | novel | Flashback to 2253: Jocelyn Treadway separates from Leonard McCoy. |
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| Boldly Go, Issue 11 | The Original Series | 2253 | comic | Flashback to 2253 |
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2254[]
2255[]
| Title | Series | Date | Media | Notes | Image |
| Child of Two Worlds Chapters 1-28 |
The Original Series | 2255 | novel | Takes place after the events of "The Cage," and also after Marvel's Early Voyages series ends. |
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| Desperate Hours | Discovery | May2255 | novel |
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| Crucible The Star to Every Wandering Chapter 5, Section 1 |
The Original Series | 2255 | novel | Flashback to Lieutenant Kirk during a mission to Beta Regenis II aboard the USS Farragut. |
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| Gary | The Original Series | 2255 | comic | Alternate account of Kirk's mission to Dimorus while aboard the USS Farragut. |
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| A Choice of Catastrophes Chapter 11 - "Thirteen Years Ago" |
The Original Series | 2255 | novel |
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| Legacy Chapters 5, 10 & 13 |
The Original Series | 2255 | novel |
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| Strange New Worlds I A Private Anecdote "Recollections" |
The Original Series | 2255 | short story |
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| Star Trek Chapter 4 |
The Original Series | 2255 | movie novelization | Events take place in an alternate reality. |
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| Star Trek (IDW) Bones 2255 flashback sections |
The Original Series | 2255 | comic | Flashback to young Leonard McCoy attending medical school, subsequent divorce, and enrollment in Starfleet Academy. Events take place in an alternate reality. |
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| Star Trek (IDW) IDW Star Trek, Issue 14 2250s flashback |
The Original Series | circa 2255 | comic | Dating very approximate. Flashback to Keenser's arrival at the Delta Vega Starfleet facilty, several years prior to Montgomery Scott's exile there. Events take place in an alternate reality. |
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2256[]
2257[]
2258[]
2259[]
Appendices[]
Connections[]
| Memory Beta Chronology: 23rd Century | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2200s | 2210s | 2220s | 2230s | 2240s | 2250s | 2260s | 2270s | 2280s | 2290s |
| Memory Beta Chronology | ||||||||
|---|---|---|---|---|---|---|---|---|
| Distant Past | Recent Past | 20th Century | 21st Century | 22nd Century | 23rd Century | 24th Century | 25th Century | Far Future |






















































































































