The format used in this timeline is esentially similar to the one employed in Mike and Denise Okuda's STAR TREK Chronology. The timeline was written in the past tense as if the writer were living in the STAR TREK universe a few years after the current adventures. Text in italics are comments made by the writer in our universe, the one in which STAR TREK was a television show. So far, this timeline contains few references from the Sulu novels and audio novels. I will add more chronological data points as I read the books and fit them into this timeline.

  Japanese ancestors of Hikaru Sulu are unjustly imprisoned in interment camps on Earth. Not until the Sanctuary Districts of the 2020's will the United States again treat a segment of its population so unfairly.

    Historical accounts.

1956

  The Huey 204 helicopter goes into widepread use on Earth. It will be used into the 21st century. In the 23rd century, Hikaru Sulu will learn how to fly a similar helicopter during his time at Starfleet Academy. In 1986, Sulu will commandeer and fly a real Huey 204 during a time-travelling visit to Earth.

    Historical accounts.

1967

  The 29th century timeship Aeon crashlands on Earth. Henry Starling finds the ship and over the next 27 years he will plunder the vessel's technology for profit.

    "Future's End, Parts I and II" [VGR]

1969

  For the first time in his career, Hikaru Sulu travels back in time to visit Earth's past. When the U.S.S. Enterprise is accidently sent into the past by a near collision with a blackhole, the ship is detected as an unidentified flying object in Earth's atmosphere. Captain Kirk and Lieutenant Sulu beam down to retrieve Air Force photographic evidence of the Enterprise.

    "Tomorrow Is Yesterday" [TOS].

1979

  Hikaru Sulu's great-great-great-great-grandfather is born in San Francisco on Earth. In 1986 at the age of seven he will unknowingly meet his distant descendant, Hikaru Sulu, on the streets of San Francisco.

    Conjecture. Assumes a generation about every 40 years. The scene depicting the chance encounter was written for STAR TREK IV: The Voyage Home and was almost filmed. Unfortunately the child actor portraying Sulu's ancestor was not able to perform on cue and when the production company lost the light the scene was abandoned.

1986

  A Klingon Bird-of-Prey piloted by Admiral Kirk and his crew, including Sulu, lands in old San Francisco to take two humpback whales back to the future. To aid in the building of an enclosure to hold the whales once caught, Commander Hikaru Sulu commandeers a Huey 204 helicopter.

    STAR TREK VI: The Voyager Home.

1996

  Tuvok and the crew of the Starship Voyager are accidentally thrown back to Earth in this year. Tuvok and the ship's bridge crew avert a 29th century temporal explosion by preventing ruthless industrialist Henry Starling from making a time trip in the 29th century timeship Aeon, which crashed to Earth in 1967.

    "Future's End, Parts I and II" [VGR]

2232

  Janice Rand born.

    Conjecture based on the age of actress Grace Lee Whitney at the time that the Original Series aired.

2237

  Hikaru Sulu born in San Francisco on Earth.

    STAR TREK Chronology

2245

  Constitution-class U.S.S. Enterprise is commissioned and begins a five-year mission of exploration under the command of Captain Robert April.

    STAR TREK Chronology

2249

  At the age of 17, Janice Rand enters the Star Service as a crewman.

    Conjecture.

2255

  Hikaru Sulu enters Starfleet Academy.

    Conjecture based on his birthdate.

2259

  Hikaru Sulu graduates from Starfleet Academy.

    Conjecture based on his entering the Academy in 2255.

2264

  Ensign Sulu is assigned to the U.S.S. Enterprise as a staff physicist.

    Conjecture. This must have happened sometime before "Where No man Has Gone Before" [TOS] (2265) because Sulu was staff physicist in that episode.

  Tuvok is born on Vulcan.

    "Flashback" [VGR]. Tuvok stated that in 2293 he was twenty-nine years old.

2266

  Lieutenant Sulu transfers to helm officer. Yeoman Janice Rand is assigned to the U.S.S. Enterprise

    Just before "The Corbomite Maneuver" [TOS] which was the first appearance of Rand on the Original series.

First Season of STAR TREK

  Stardate 1512.2. The U.S.S. Enterprise encounters the First Federation scout ship Fesarius commanded by Balok.

    "The Corbomite Maneuver" [TOS]. Sulu was first seen as the ship's Helmsman in this episode.

  Stardate 1704.2. Under the effects of the Psi 2000 virus, Lieutenant Sulu fancies himself a reincarnation of D'Artagnan and he emperils other crewmembers with a fencing foil.

    "The Naked Time" [TOS].

2267

  Yeoman Janice Rand transfers off of the U.S.S.Enterprise while the ship is at Starbase 11 for Captain James Kirk's court-martial.

    Sometime after "Miri" [TOS] which was the last appearance of Rand on the Original series.

  Stardate 3113.2. For the first time in his career, Lieutenant Sulu visits Earth's past in the year 1969. He assists Captain Kirk in retrieving Air Force photographic records of the Enterprise in Earth's atmosphere.

    "Tomorrow Is Yesterday" [TOS].

  Stardate 3156.2. Sulu is temporarily absorbed by the Body of Landru followers. In this brainwashed state, Sulu had no memory of his life in Starfleet.

    "Return of the Archons" [TOS].

  Stardate 3417.3. Sulu is overcome by the effects of the spores on Omicron Ceti III and deigns to leave Starfleet and live on the planet. Sulu returned to normal after Kirk and Spock found a way to rouse the crew out of their spore-induced trance.

    "This Side of Paradise" [TOS].

Second Season of STAR TREK

  A hostile parallel universe is discovered in which Sulu is the head of security aboard the Imperial Starship Enterprise in an evil Terran Empire.

    "Mirror, Mirror" [TOS].

2268

Third Season of STAR TREK

  Sulu and the crew of the U.S.S. Enterprise encounter Klingon Commander Kang. Sulu as captain of the Excelsior, will again encounter Kang in the Azure Nebula in 2293.

    "Day of the Dove" [TOS].

2269

First Season of Animated STAR TREK

2270

Second Season of Animated STAR TREK

  Captain James Kirk's five-year mission ends and the Starship Enterprise returns to Earth. The ship is the only one of her class to return intact and the crew of the vessel are lauded as heroes at welcome-home celebrations.

The Enterprise enters drydock in Earth orbit for an eighteen-month refit period.

    STAR TREK Chronology

  Hikaru Sulu promoted to the rank of Lieutenant Commander.

  Janice Rand becomes transporter chief on the U.S.S. Enterprise.

    Conjecture. This happened sometime before STAR TREK: The Motion Picture. (Note that her rank appears to be chief petty officer at this point).

  While vacationing with Pavel Chekov, Hikaru Sulu meets Susan Ling (a.k.a. Ling Siu), the woman who will bear him a daughter, Demora.

    "The Captain's Daughter" [Novel]

2271

  The U.S.S. Enterprise leaves drydock and embarks on a second five-year mission of exploration under the command of Admiral James Kirk.

    STAR TREK Chronology

  Unknown to him, Susan Ling bears Hikaru Sulu a daughter, Demora.

    "The Captain's Daughter" [Novel]

2276

  The U.S.S. Enterprise returns safely to Earth after its second five-year mission of exploration.

    STAR TREK Chronology

  Janice Rand enters a special commissioning program at the Starfleet Academy.

    Conjecture based on Rand being an officer in 2285 as seen in STAR TREK III: The Search For Spock.

2278

  Lieutenant Commander Hikaru Sulu is offered the position of first officer of the Soyuz-class U.S.S. Bozeman (NCC-1941) under the command of Captain Morgan Bateson, which he gladly accepts. Shortly before he is to report for duty, however, Sulu learns that he has a daughter and that Susan Ling, the child's mother, has died of Sakuro's disease. Sulu makes the decision to turn down the posting on the Bozeman and stay on Earth to raise his daughter.

    "The Captain's Daughter" [Novel]

  Janice Rand completes a special program at Starfleet Academy and is commissioned an Ensign.

    Conjecture based on Rand being an officer in 2285 as seen in STAR TREK III: The Search For Spock.

2280

  On Vulcan, sixteen-year-old Tuvok develops a crush on a fellow classmate, Jara, who is the daughter of a Terrellian diplomat. Tuvok refuses to deny his passions prompting his school to revoke his seat and his father to send him to a Vulcan monastery against his will. After working with a Vulcan Master for several weeks, Tuvok learns to control his emotions.

    "Gravity" [VGR]. Exact age is conjecture based on his apparent age in the episode.

2281

  At the age of 10, Hikaru Sulu takes Demora to visit the Academy in San Francisco. There she meets Captain James Kirk. Demora and Kirk will not meet again until 2293.

    STAR TREK: Generations. In 2293, Chekov reminded Kirk that he met Demora twelve years before. This meeting was also elucidated upon in "The Captain's Daughter" [Novel]

2282

  Hikaru Sulu promoted to the rank of Full Commander.

    Conjecture. Assumes he spent eight years as Commander before being promoted to Captain in 2290.

2284

  Stardate 8105.5. U.S.S. Excelsior commissioned in San Francisco with registry NX-2000.

    From the ship's dedication plaque.

2285

  Rand is promoted to Lieutenant and transfers to duty at Starfleet Command on Earth.

    Conjecture. This happened sometime before STAR TREK III: The Search For Spock.

  The Starship Excelsior undergoes transwarp drive test trials under the command of Captain Styles.

    STAR TREK III: The Search For Spock.

2286

  Stardate 8390. An alien space probe of unknown origin comes to Earth in order to communicate with humpback whales, which had become extinct on Earth. The probe wreaks environmental havoc on Earth. Lieutenant Janice Rand and Doctor Christine Chapel assist in Starfleet Headquarters during the crisis. Admiral James Kirk and his shipmates travel back in time to 1986 and bring two humpback whales to 2286. The probe communicates with the whales and leaves the Earth in peace.

In appreciation of Kirk's efforts he is granted command of a new Starship Enterprise (NCC-1701-A).

    STAR TREK IV: The Voyage Home.

2287

  The Excelsior is fitted with standard warp drive, redesignated as an exploratory vessel and its registry is changed from NX-2000 to NCC-2000.

    STAR TREK Chronology

  Sybok, Spock's half brother, commandeers the U.S.S. Enterprise-A. He does this with the help of several members of the crew, including Commander Sulu, who had been influenced by Sybok.

    STAR TREK V: The Final Frontier.

2289

  Tuvok enters Starfleet Academy.

    "Flashback" [VGR].

2290

  Hikaru Sulu is promoted to Captain and assigned as the commanding officer of the U.S.S. Excelsior. The ship leaves on a three-year mission to chart gaseous anomolies in the Beta Quadrant. Lieutenant Commander Janice Rand is assigned as the ship's Communications Officer.

    STAR TREK VI: The Undiscovered Country. In 2293, Sulu stated in his log that he has just returned from a three year mission.

  Demora Sulu enters Starfleet Academy.

    Conjecture based on her birthdate.

2293

  Ensign Tuvok graduates from Starfleet Academy and is assigned to the U.S.S. Excelsior as a junior science officer.

    "Flashback" [VGR]. Sulu mentioned that Tuvok had less than two months space duty at the time of the episode.

   Upon successful completion of their mission in the Beta Quadrant, the crew of the Excelsior encounters a subspace shock wave resulting from the accidental destruction of the Klingons' chief energy-producing moon, Praxis. Captain Sulu communicates with the Klingons and offers them assistance. This offer is refused. A short while later Klingon Chancellor Gorkon is assassinated and Captain James Kirk and Dr. McCoy are accused of the crime and are taken to the Klingon Homeworld to be tried. Against Starfleet orders, Captain Sulu decides to mount a rescue of Kirk and McCoy. Junior science officer Ensign Tuvok confronts Captain Sulu about the breach of orders but to no avail. To conceal the Excelsior's approach to Qo'noS, Sulu orders the Excelsior through the Azure Nebula, and it is there that he encounters a Klingon Battle Cruiser commanded by Captain Kang.

In the ensuing battle, junior science officer Dmitri Valtane is fatally injured. (It is at this time that a memory engram virus leaves Valtane's brain and enters Tuvok's. The virus will remain in Tuvok until 2373). To evade Kang, Sulu orders that the volatile sirillium in the nebula be ignited. After escaping the Klingons, Captain Sulu reconsidered the situation and aborted the rescue mission.

  Captain Sulu and the Excelsior later played a key role in the Khitomer Peace Conference of 2293 by assisting the U.S.S. Enterprise-A in its battle with General Chang's prototype Bird-of-Prey and by preventing the assassination of Klingon Chancellor Azetbur.

    STAR TREK VI: The Undiscovered Country, "Flashback" [VGR].

  U.S.S. Enterprise-A retired from service.

    STAR TREK VI: The Undiscovered Country. Just after the movie.

  The Excelsior-class U.S.S. Enterprise-B commissioned, Captain John Harriman commanding.

  Demora Sulu graduates from the Academy and is assigned to the U.S.S. Enterprise-B as helmsman.

    STAR TREK: Generations. Just before the movie.

  The U.S.S. Enterprise-B has its maiden voyage. Among the passengers on the ship are Starfleet VIPs Captain James Kirk, Captain Montgomery Scott and Commander Pavel Chekov. Kirk and Demora meet again. While on its maiden voyager, the Enterprise responds to the distress call of two transport ships carrying El-Aurian refugees. The rescue effort is hindered when the ship encounters an energy ribbon. During the rescue, the Enterprise is struck by a tendril of energy causing a hull breach which pulls Kirk from the ship. History records that James Kirk died in 2293, but in fact, Kirk has been pulled into the nexus. In 2371, Kirk will emerge from the nexus to assist Captain Jean-Luc Picard save Veridian IV.

    STAR TREK: Generations.

2298

  Tuvok leaves Starfleet and returns to Vulcan to undergo the Kolinahr.

    "Flashback" [VGR]. Tuvok stated that he entered pon farr six years after starting the Kohlinar. He left the Kohlinar in 2304 to marry T'Pel.

2304

  Tuvok enters pon farr and leaves the Kohlinar before completion. Tuvok marries T'Pel.

    "Flashback" [VGR]. Tuvok stated that he entered pon farr six years after starting the Kohlinar, and that he left it to marry T'Pel. Also in "Ex Post Facto" [VGR] (2371), Tuvok stated that he had been married for 67 years.

2305

  Future Enterprise captain Jean-Luc Picard is born on Earth in LaBarre, France.

    The STAR TREK: Chronology

2340 - 2371

  During this period Kathryn Janeway sees a portrait of Captain Sulu hanging in Starfleet HQ.

    "Flashback" [VGR].

2343

  The U.S.S. Enterprise-B is retired from service or has been destroyed sometime prior to this date.

    "Yesterday's Enterprise" [TNG].

2344

  The Ambassador-class U.S.S. Enterprise (NCC-1701-C) is destroyed at Narendra III. It will be another 19 years before Starfleet commissions another starship named Enterprise.

    "Yesterday's Enterprise" [TNG].

2349

  Tuvok returns to Starfleet and serves aboard the U.S.S. Wyoming.

    "Flashback" [VGR]. Janeway stated that Tuvok left Starfleet for more than fifty years before returning.
    "Learning Curve" [VGR]. Tuvok stated that he taught for 16 years at Starfleet Academy. (2349 is 51 years after 2298).

2350

  While patrolling the Cardassian border, Captain Hikaru Sulu meets a young man named Chakotay, who lives on a colony in the area. After some discussions, Sulu recommends Chakotay for Starfleet Academy.

    "Tattoo" [VGR]. The scriptwriters intended this to be THE Captain Sulu, who would be 113 years old at this point. He probably left Starfleet for a time then returned years later, thus explaining why he wasn't an Admiral. Perhaps he spent several years out of Starfleet as an Ambassador. See Note Below.

2351

  Tuvok leaves the U.S.S. Wyoming and becomes an instructor at Starfleet Academy.

    Assumes he was aboard the Wyoming for two years.

2363

  The Galaxy-class U.S.S. Enterprise (NCC-1701-D) is commissioned.

    STAR TREK Chronology.

2365

  Kathryn Janeway first meets Tuvok when he dresses her down in front of three Admirals for not following security protocols during her previous space voyage.

    "Revulsion" [VGR]. Nine years before the episode. Note: The full account of Janeway and Tuvok's first meeting was first relayed in the novel "Mosiac" by Jeri Taylor. Here, as in the third season episode "Coda" [VGR], bits of Janeway's backstory first told in "Mosaic", are finding their way into actual Voyager episodes.

2367

  Tuvok ends his stint as an instructor at Starfleet Academy. In the years between 2367 and 2371, Tuvok will serve several years with Kathryn Janeway.

    "Learning Curve" [VGR]. Tuvok stated that he taught for 16 years at Starfleet Academy.

2368

  Commander Kathryn Janeway is assigned as executive officer of the U.S.S. Billings. Lieutenant Junior Grade Tuvok was also aboard at the time. During her first year aboard, she sent an away team to survey a volcanic moon. Their shuttle was damaged by a magma eruption, and three crewmembers were severely injured. The next day Janeway returned to the moon alone to complete the survey. She wanted the crew to know that their suffering had not been in vain.

    "Night" [VGR]. Tuvok mentioned that this happened during Janeway's first year as a commander aboard the Billings.

2370

  Stardate 47215.5. The Excelsior, presumably under the command of a different captain, assists the U.S.S. Nobel in the ultimately unsuccessful search and rescue mission for the U.S.S. Hera.

    "Interface" [TNG]

2371

  Stardate 48038.5. The U.S.S. Voyager (NCC-74656), an Intrepid-class starship, is launched under the command of Captain Kathryn Janeway. Lieutenant Tuvok is the ship's tactical officer.

    The launch date was mentioned in "Future's End, Part I" [VGR]

  Lieutenant Tuvok begins an undercover mission to infiltrate a Maquis cell of which Chakotay and B'Elanna Torres are members.

    Some months before "Caretaker" [VGR]

  Stardate 48315.6. While pursuing a Maquis ship in the Badlands, the U.S.S. Voyager is drawn into the Delta-Quadrant of the galaxy, some 70,000 light years from Federation space, by a powerful being. Starfleet believes the ship to be destroyed in the Badlands.

    "Caretaker" [VGR], "Non Sequitur" [VGR]

  Stardate 48734.2. A member of the Komar species takes control of Tuvok in an attempt to lead Voyager into a dark-matter nebula so that the Komar could extract the crew's neural energy. The crew prevent the Komar's plans and Tuvok is restored to normal.

    "Cathexis" [VGR]

2372

  After Voyager crewman Lon Suder commits murder, Tuvok mind melds with him in order to understand his motives. Suder becomes much more stable and centered after the meld. Unfortunately, Tuvok acquires Suder's violent emotions and he has great difficulty purging them after the meld.

    "Meld" [VGR].

  Stardate 49655.2. In a transporter mishap while beaming up from a planet, Lieutenant Tuvok and Neelix are fused at the genetic level. The resultant being adopts the name Tuvix and becomes a part of the crew for a number of weeks. The Emergency Medical Hologram aboard the Voyager discovers a way to separate Tuvix into Tuvok and Neelix. Tuvix refuses to undergo the separation process because he does not want to die. Captain Janeway ultimately compels him to, and Tuvok and Neelix are restored.

    "Tuvix" [VGR].

  Stardate 49827.5. The Sovereign-class U.S.S. Enterprise (NCC-1701-E) is commissioned under the command of Captain Jean-Luc Picard.

    STAR TREK: First Contact. Almost a year before the film which took place in late 2373. Stardate comes from the ship's dedication plaque.

2373

  Stardate 50126.4. The memory engram virus that entered Tuvok's brain in 2293 following Dmitri Valtane's death, resurfaces when the U.S.S. Voyager encounters a nebula that looks just like the Azure Nebula. The Voyager's holographic doctor successfully destroys the virus with thoron radiation.

    "Flashback" [VGR].

2374

  Stardate 51186.2. Captain Kathryn Janeway promotes Tuvok to the rank of Lieutenant Commander.

    "Revulsion" [VGR].

  Retired senior Starfleet officer Hikaru Sulu becomes stranded on the planet KDZ-E25F after the transport ship Victoria Adams crashes there. The U.S.S. Defiant crew rescues him on the direction of Admiral Alynna Nechayev.

    "STAR TREK: Deep Space Nine - Day of Honor Book 2 of 4: Armageddon Sky" [Novel].

2375

  Stardate 52438.9. Tuvok and Tom Paris' shuttle passes through a subspace sinkhole and becomes stranded on an inhospitable Class-D planet within. The crew of the U.S.S. Voyager eventually rescues them along with another stranded individual, Noss, a woman who has fallen for the unattainable Tuvok.

    "Gravity" [VGR].

  Tuvok experiences lapses in concentration and Voyager's Doctor diagnoses him with a degenerative neurological condition which can only be cured via a special mind meld with a compatible Vulcan. Tuvok begins periodic treatments for the malady which he chooses to keep a secret from Captain Janeway and the crew. If not cured, the condition's symptoms will become serious and untreatable in several years time.

    "Endgame, Part II" [VGR]. Several months before the episode

2376

  Stardate 53263.2. While returning to the U.S.S. Voyageraboard the Delta Flyer, Tuvok is attacked by a Ba'Neth intruder. The alien uses a weapon against Tuvok which profoundly affects his brain, sending him into a neuroleptic shock induced coma. After regaining consciousness aboard the Voyager, the crew discover that Tuvok is not the same as before. He is less intelligent, but more emotional. Neelix and Tuvok become friends and this new Vulcan experiences joy relating to people and making elaborate desserts. When the Doctor creates a treatment for the effects of the Ba'neth weapon, Tuvok is initially reluctant to undergo the procedure when he realizes that when returned to normal, he will no longer smile or have fun or be friends with Neelix. Neelix convinces him to undergo the procedure, and Tuvok is returned to normal.

    "Riddles" [VGR].

  Captain Kathryn Janeway, Lieutenant Commander Tuvok and Lieutenant B'Elanna Torres pose as drones and go aboard a Borg cube in order to prevent the Borg Queen from destroying Unimatrix Zero, a dreamlike realm where certain Borg drones can meet and experience life as individuals during their regeneration cycles.

    "Unimatrix Zero, Part I" [VGR].

2377

  Stardate 54014.4. While still aboard the Borg ship, Captain Janeway, Tuvok and B'Elanna Torres are captured by the Queen. During this time, Tuvok loses his individuality for a time and is controlled by the Collective.

    "Unimatrix Zero, Part II" [VGR].

  Stardate 54238.3. While the U.S.S. Voyager crew is busy helping free Harry Kim, Seven of Nine and the Doctor from captivity aboard a Lokirrim patrol ship, Tuvok enters pon farr and has to be ministered to by Tom Paris in the Doctor's absence. Because deep meditation and special drug therapy do little to alleviate the mating instinct in Tuvok, he decides to satisfy the drive by being with a holographic representation of his wife T'Pel in the ship's holodeck.

    "Body and Soul" [VGR].

  Stardate 54973.4. The U.S.S. Voyager crew is visted by Admiral Kathryn Janeway who has traveled back in time from the year 2404 to help them get home earlier. Using the technology brought by Admiral Janeway, Captain Janeway and her crew enter a huge Borg transwarp hub to destroy it.   Admiral Janeway allows herself to be assimilated by the Borg Queen and she infects the collective with a neurolytic pathogen. Then when the hub's shielding goes down, the huge complex of interspatial manifolds and transwarp conduits is destroyed, and the Starship Voyager uses one of the conduits to travel home. The ship is met by several Starfleet vessels and is escorted home to Earth.

    "Endgame, Parts I and II" [VGR].

  Now back in the Alpha Quadrant, Tuvok travels from Earth to Vulcan and undergoes the fal-tor-voh mind meld with a family member to cure his neuroglogical condition.

    "Endgame, Part II" [VGR]. Just after the episode

  For heroic performance while her ship was lost in the Delta Quadrant for seven years and for returning to the Alpha Quadrant with her ship and its crew nearly intact, Starfleet Command promotes Kathryn Janeway to the rank of admiral.

    "Endgame, Part II" [VGR]. Some weeks after the episode

2378

  Admiral Kathryn Janeway attached to Starfleet Command, gives Captain Jean-Luc Picard special orders which will ultimately lead him and the crew of the U.S.S. Enterprise (NCC-1701-E) deep into the Romulan Star Empire.

    STAR TREK: Nemesis.

2394

  In an alternate reality, the U.S.S. Voyager makes its triumphant return to Earth 23 years after being stranded in the Delta Quadrant.

    "Endgame, Part I" [VGR].

2404

  In an alternate reality in which Voyager returned to Earth in 2394, Admiral Kathryn Janeway decides to travel back in time in order to allow the lost starship to return home much earlier. In this timeline, Tuvok has been institutionalized because his incurable degenerative neurological disease has left him a shell of his former self. Her plans are successful, and her reality is replaced with the one in which the Starship Voyager returned home in 2377.

    "Endgame, Parts I and II" [VGR].