Star Trek - Those pesky stardates

Web log, Earth date 2007.11, science officer Richard McGinlay recording. Analysis of the stardates used in the various incarnations of the
Star Trek television and movie series have revealed the numerical system to contain a number of peculiar anomalies. For example, the dates appear not to have progressed at a consistent rate over the years, and sometimes they even seem to run backwards! Should we therefore disregard this obviously flawed system? Further sensor readings are required...

All Star Trek fans know what stardates are. They’re those silly numbers with a decimal point that the captains of all the Trek series (with the exception of Star Trek: Enterprise) have used to record the passage of time in a non-Gregorian way.

In Trek mythology, it appears that the stardate system is adopted across the Federation some time between 2161 (the end of Star Trek: Enterprise) and 2265 (the year in which the Original Series episode Where No Man Has Gone Before is now assumed to take place). Stardates are seen to be in use as far back as the 2150s, by species including the Vulcans and the Xindi, though Earth has not yet embraced the system at this time. In the episode Damage, the Xindi-Primate Degra sends a coded message containing co-ordinates and a stardate for where and when the Enterprise should rendezvous with his ship. T’Pol is able to determine that the stardate is three days hence.

Behind the scenes, stardates were originally invented in order to remind viewers that the show is set in a distant future, without tying the series down to a specific year or even a specific century. Creator Gene Roddenberry was all too aware that the pace of technological change can be hard to predict - who knew how many years it would take for interstellar travel or transporter technology to become a reality? The captain’s log voice-overs were also useful devices for recapping the story so far following a commercial break.

Later on, the movie Star Trek II: The Wrath of Khan specified the century (the 23rd), before the Next Generation episode The Neutral Zone mentioned the year for the first time (2364). However, stardates remained in use throughout TNG, Deep Space Nine and Voyager, as part of the traditional Star Trek formula.

Unfortunately, despite having the best of reasons for introducing the concept of stardates, Roddenberry failed to devise a proper system with which writers could apply them. Little thought was given to the numbers used in The Original Series, except that they generally increased over time.

Any viewers who have paid much attention to The Original Series and The Animated Series will probably have noticed that stardates often don’t progress in either production order or broadcast order. This is partly because, when the episodes were filmed, the production team had little or no idea in which sequence the television network would choose to transmit them. However, this is not really a problem: we can simply assume that the events take place in a different order to that in which they were produced or aired.

What is more difficult to explain is how stardate time seems to progress at different rates over different periods. For instance, the duration of Captain Kirk’s initial five-year mission on board the USS Enterprise appears to take place between the stardates 1310.0 (around the time of Where No Man) and 7405.0 (after the events of the animated episode Bem). This implies that each year of that mission lasts for approximately 1200 stardate units. In light of this calculation, the gap of just 0015.0 stardate units between the end of Where No Man and the beginning of Mudd’s Women seems incredibly small when you consider all the upgrades that the starship and its crew’s uniforms evidently undergo between the two episodes (which, in the real world, were due to sets and costumes being redesigned between the production of the second pilot and the first season proper).

However, that’s nothing compared to the miniscule gap of less than 0008.0 stardate units that exists between the end of Bem (stardate 7403.6) and the beginning of Star Trek: The Motion Picture (stardate 7410.2), during which time Admiral Kirk spends two and a half years away from the captain’s chair serving as Chief of Starfleet Operations!

There are also several instances in which the values of stardates contradict the explicit order of events, while on other occasions the dates of certain episodes overlap each other.

Should we therefore simply disregard stardates? I don’t think so. They are as much a part of Star Trek mythology as transporters, tricorders and warp drive. To ignore them would be like ignoring Captain Kirk’s middle initial, another staple ingredient of Trek that hasn’t always been applied consistently.

The first time we encounter Kirk’s middle initial, in the episode Where No Man Has Gone Before, it is inscribed on a gravestone that his super-powered former friend Gary Mitchell has created. It reads: “James R Kirk”. However, every subsequent reference to Kirk’s middle name has been “T” or “Tiberius”. Do were therefore ignore the fact that Kirk has a middle name? No, of course we don’t. Do we take the first instance as canon and the rest as mistakes? No: we accept the vast majority of instances that are consistent (all the instances of “T” and “Tiberius”) and dismiss the minority (the single instance of “R”).

We can go further, though, by attempting to rationalise the anomalous minority. In his trilogy of novels My Brother’s Keeper, Michael Jan Friedman suggests that the initial “R” is a private joke shared by Kirk and Mitchell that stands for various things, including “racquetball” (“Racquetball? That’s practically my middle name!”) and even “rhinoceros”. Following this line of reasoning, it could also stand for Republic, the vessel on which these men first served together on a training mission. Or it might mean “rulebook”, given Mitchell’s recollection, in Where No Man of Kirk being “a stack of books with legs” in his academy days. Peter David’s novel Q-Squared implies that the events of Where No Man take place in a parallel universe. Alternatively, maybe Jim lied to Gary about his middle name, to prevent being teased about it.

We can approach stardates in the same way: accept the instances that make sense, and disregard or attempt to explain those that do not.

When pressed for an explanation for the oddities surrounding stardates, Gene Roddenberry once came out with the following: “This time system adjusts for shifts in relative time which occur due to the vessel’s speed and space-warp capability. It has little relationship to Earth’s time as we know it. One hour aboard the USS Enterprise at different times may equal as little [sic] as three Earth hours. The stardates specified in the log entry must be computed against the speed of the vessel, the space warp, and its position within our galaxy, in order to give a meaningful reading.”

Roddenberry later admitted that he hadn’t really understood what he had said: “I’m not quite sure what I meant by that explanation, but a lot of people have indicated it makes sense. If so, I’ve been lucky again, and I’d just as soon forget the whole thing before I’m asked any further questions about it.”

The relativistic explanation is nonsense, because if starship crews really were susceptible to such effects when travelling at high velocities, the time dilation they experienced would be in the region of years or centuries, not mere hours or days. Therefore we must accept that warp-drive technology ordinarily avoids the issue of time dilation, because its method of warping (bending) space effectively shortens the distance between two points.

It is more likely that disparities in stardate progression can be attributed to variations in local space-time conditions. The Original Series episode The Naked Time suggests that the ship’s chronometers are able to display relative time, as determined by an external source, rather than subjective time - how else can the chronometer on Sulu’s panel determine that the ship is travelling backwards in time? The TNG episode Cause and Effect reveals that it is sometimes necessary for Starfleet vessels to contact a nearby time beacon in order to re-synchronise their internal chronometers following exposure to local temporal distortion.

When The Next Generation went into production, efforts were made to devise a more cohesive system of stardates. This used five-digit numbers, initially starting with a 4 (representing the 24th century), followed by the season number. Thus, first-season stories have stardates that begin 41---, second-season stories are indicated by 42---, and so on. After a fairly shaky start, these dates progressed in an orderly fashion. Deep Space Nine and Voyager retained the same system, though the numbers eventually increased to the point at which the first digit was 5 (this digit does not represent the 25th century).

In this era, each television season occupies one Earth year in the Star Trek universe. Thus, 1000 stardate units are equivalent to one year. One stardate unit is equal to 0.36525 days, or 08 hours 45 minutes 57.6 seconds. In another words, one Earth hour equals slightly more than 0.114 stardate units (give or take the aforementioned variations in local space-time conditions).

It is commonly supposed that 24th-century stardates are aligned so that a stardate divisible by 1000 occurs close to the start of a year on the Gregorian calendar. However, there is clear evidence to dispute this. When Captain Picard visits France in the episode Family (stardate 44012.3) the sunny weather suggests spring, summer or early autumn rather than winter. In Data’s Day, the android logs a stardate of 44390.1 and states that the ship is preparing to celebrate the Hindu festival of lights. Otherwise known as Diwali, this celebration occurs each year during mid- to late October or early to mid-November. Taking this evidence into account, the start of each year on the Gregorian calendar would occur around the stardate --600.0 mark. Stardates divisible by 1000 would therefore occur some time around June.

Working backwards from the established date of The Neutral Zone, the five-digit dating system would appear to have started around the middle of the year 2322. This is illustrated in the following timeline, which includes the dates of some key events, such as the Khitomer Massacre, which is mentioned in the episode Sins of the Father as having taken place in the year 2346 and on stardate 23859.7...

Stardate 00000.0 = June 2322
Stardate 00600.0 = January 2323
Stardate 01000.0 = June 2323
Stardate 02000.0 = June 2324
Stardate 03000.0 = June 2325
Stardate 04000.0 = June 2326
Stardate 05000.0 = June 2327
Stardate 06000.0 = June 2328
Stardate 07000.0 = June 2329
Stardate 08000.0 = June 2330
Stardate 09000.0 = June 2331
Stardate 10000.0 = June 2332
Stardate 20000.0 = June 2342
Stardate 23859.7 (the Khitomer Massacre) = April 2346
Stardate 30000.0 = June 2352
Stardate 40000.0 = June 2362
Stardate 41153.7 (Encounter at Farpoint) = July 2363
Stardate 41986.0 (The Neutral Zone) = May 2364
Stardate 44012.3 (Family) = June 2366
Stardate 44390.1 (Data’s Day) = October 2366
Stardate 48000.0 = June 2370
Stardate 48632.4 (
Star Trek: Generations) = January 2371
Stardate 50000.0 = June 2372

This suggests that a different stardate system is in use prior to 2322. Perhaps this year witnesses a crucial turning point in Federation history, which is marked by the new dating system, rather like the adoption of Anno Domini a couple of millennia ago.

Once we accept the likelihood that stardates are reset to zero during the 24th century, we invite speculation that the sequence may have gone though a number of previous resets.

For example, in Where No Man (stardate 1312.4-1313.8), onscreen medical records for Gary Mitchell and Elizabeth Dehner show their dates of birth as stardate 1087.7 and stardate 1089.5 respectively. Mitchell’s age is recorded as 23, Dehner’s as 21. One interpretation of these figures is that stardates passed far more slowly during the years leading up to 2265, with just one stardate unit being roughly equivalent to one Earth year! It’s understandable that this system might prove unpopular, because of the need for excessive numbers of decimal places in order to represent accurate dates, which might explain the adoption of “faster” dates by stardate 1110.7 (1087.7 + 23).

However, Kirk’s gravestone in the same episode shows a birth date of stardate 1277.1. How can this fit in with the above? It is extremely unlikely that Kirk is younger than Mitchell. Some fans believe that 1277.1 may refer to the date on which Kirk assumed command of the Enterprise.

Alternatively, it could be that four-digit stardates are routinely reset about once every decade. This would mean that the numbers cycle back around to zero once between the birth of Kirk and that of Mitchell, and twice between Dehner’s birth and the events of Where No Man. This would also mean that Mitchell and Dehner are born within hours of each other, but that is entirely possible, if coincidental. The ages shown on their medical records could indicate their ages at the time of their respective medical examinations rather than their current ages.

This notion of “resetting the clock” could also account for the stardate of 2794.7 attributed to Governor Kodos’s slaughter of more than 4,000 of his own people on Tarsus IV, which is said to occur some twenty years before the events of The Conscience of the King (stardate 2817.6-2819.8).

It also ties in with the gap of fifteen years that is said to elapse between Space Seed (3141.9-3143.3) and Star Trek II: The Wrath of Khan (8130.3-8141.6), whilst explaining the seemingly small stardate gaps between Star Trek: The Motion Picture and Star Trek II, and between Star Trek V: The Final Frontier (8454.1) and Star Trek VI: The Undiscovered Country (9521.6-9529.1).

Presumably there is some way of distinguishing cycles of stardates when necessary, such as calling them First Cycle or First Series, Second Cycle or Second Series, etc, though this would only ever be required when referring to previous cycles - in much the same way that, whenever anybody today refers to the ’90s, we assume that they mean the 1990s unless otherwise indicated.

You may have noticed that I keep on using words like “about” and “approximately”. This is because, even assuming that stardates cycle around every decade or so, the durations of these cycles are not entirely consistent. They seem to vary between approximately 900 stardate units to one Earth year during the time of the Tarsus tragedy, to about 1200 stardate units per year during the time of Captain Kirk’s first five-year mission in command of the USS Enterprise.

This may be explained by variances in local space-time conditions. If we assume that some galactic phenomenon, such as a pulsar, is used as the benchmark for measuring stardates, then this could be influenced by temporal effects or spatial expansion occurring between the object and the site where observations are made of it. By 2322, it appears that such anomalies have been overcome, perhaps owing to improvements in scanning technology or the selection of a point of reference that is not so prone to local effects. (My bafflegab is beginning to sound a bit like Mr Roddenberry’s now!)

There remain some specific inconsistencies in certain episodes, but these are relatively easy to resolve...

For his first log entry in the episode Mudd’s Women, Kirk records a stardate of 1329.8. However, two subsequent log entries are dated earlier than this (1329.1 and 1329.2 respectively). I assume 1329.8 to be a slip of the tongue and that Kirk actually means 1328.9.

The stardate gap between the end of Where No Man (1313.8) and the beginning of Mudd’s Women seems too small to accommodate all the equipment upgrades that the Enterprise has evidently undergone in the meantime. Some fans have speculated that during The Original Series stardates reflect the duration of each individual vessel or colony’s mission, rather than being synchronised throughout the Federation. Stardates might therefore be suspended whenever a ship is taken off active duty for lengthy repairs or refitting, as appears to be the case here.

If this is the case, then the Enterprise’s stardates for the events of The Doomsday Machine are not known. Commodore Decker of the USS Constellation records a log entry for stardate 4202.1, but modifications to Enterprise equipment and uniforms in episodes with seemingly earlier stardates suggest that the Enterprise’s dates are not “in synch” with those of the Constellation. Production-wise, this is the first episode in which Kirk wears his second-season wraparound costume and the only episode in which its V-neck lacks a black trim. Production order would place this episode immediately before Wolf in the Fold (3614.9), which provides a convenient explanation for Uhura’s absence from The Doomsday Machine: she’s recovering from her brain wipe in The Changeling (3541.9). This would mean that the logs of the Enterprise and the Constellation are “out of synch” to the tune of approximately 0600.0 stardate units, or about five to six months, which may be an indication of how long the Enterprise’s refit lasted between Where No Man and Mudd’s Women.

This theory may also explain why Professor Starnes’s log for the science colony on Triacus in And the Children Shall Lead is out of synch with the Enterprise’s logs by at least 0011.0 stardate units. In the episode, the ship arrives at Triacus on stardate 5029.5. However, when the late Professor Starnes’ reports are played back, they cover the period 5025.3-5038.3.

It could also account for the miniscule stardate gap that exists between the end of the animated episode Bem (7403.6) and the beginning of The Motion Picture (7410.2), if we assume that the Enterprise’s stardates are suspended during its extensive refit.

Perhaps the purpose of such hiatuses is to give a better indication of ships’ and bases’ operational lifespans. Maybe this is why Admiral Morrow thinks the Enterprise is only twenty years old in The Search for Spock: it could actually be close to that figure in terms of actual years of service. Alternatively, Morrow might just be getting confused by the stardates, especially since, by the time of The Wrath of Khan, the Federation appears to have abandoned the idea of individual vessels and settlements using their own stardate systems (the USS Reliant’s stardates seem to be synchronous with those of the Enterprise).

On a couple of occasions, Original Series episodes clash with each other in terms of their stardates. Kirk’s log entries in The Man Trap cover the period 1513.1-1513.8, which falls right in the middle of The Corbomite Maneuver (1512.2-1514.1). Similarly, the stardates for Dagger of the Mind (2715.1-2715.2) conflict with those of Miri (2713.5-2717.3). I assume that Kirk actually says “thirty” rather than “thirteen” in The Man Trap and “fifty” rather than “fifteen” in Dagger of the Mind, giving us stardates of 1530.1-1530.8 and 2750.1-2750.2 respectively.

Similarly, in The Conscience of the King (stardate 2817.6-2819.8), Spock estimates that the ship will arrive at the Benecia Colony on stardate 2825.3, but The Galileo Seven spans the stardates 2821.5-2823.1. Evidently the ship accelerated once the murderer had been discovered and was able to improve on Spock’s estimate.

For his first log entry in The Deadly Years, Kirk records a stardate of 3478.2, but for his second entry he says 3579.4. I take this to be an early indication of senility caused by his accelerated ageing and that he actually means 3479.4.

Similarly, the initial log entry in Spock’s Brain is stardate 5431.4, but the second one is for stardate 4351.5. Again, I think matters are preying on the captain’s mind: he is worried about his first officer’s stolen brain, and probably means to say 5431.5. He also gets the designation of the planet Sigma Draconis VI wrong, twice referring to it as Sigma Draconis VII - that’s how worried he is!

At least three episodes of The Animated Series contain invalid stardates. The Magicks of Megas-Tu is said to take place on stardate 1254.4, which would place it before Where No Man Has Gone Before. However, the uniform and bridge design do not reflect this. The Eye of the Beholder seemingly occurs on stardate 5501.2, which places it in the middle of The Ambergris Element (5499.9-5506.2). The Practical Joker is apparently set during stardate 3183.3, but it must actually take place after The Enterprise Incident (5027.3-5027.4) because it shows Romulans using Klingon-designed D-7 class battle cruisers.

In the timeline at the end of this feature, I have placed The Magicks of Megas-Tu in production order, after Mudd’s Passion (4978.5). The Eye of the Beholder has also been placed in production order, between The Terratin Incident (5577.3-5577.7) and Once Upon a Planet (5591.2). I have placed The Practical Joker just before How Sharper Than a Serpent’s Tooth (6063.4-6063.5), again in production order. The explanation for these erroneous stardates (shown as strikethrough text in my timeline) could be computer error. The Enterprise’s computer systems are seen to fail in The Magicks of Megas-Tu, and a gaseous energy field affects the computer in The Practical Joker. I’m not suggesting that the crew do not know what the date is when they make their log entries, but that the computer erroneously adjusts the voice recordings of certain dates, rather like a present-day computer with an inaccurate internal clock assigning misleading modification dates to files.

In my timeline, you may notice that I have placed Star Trek II: The Wrath of Khan in the year 2282. Most chronologies place the film later than this, despite both Kirk and Khan referring to the events of Space Seed (2267) as having taken place fifteen years earlier. This is because the vintage of the Romulan ale that McCoy gives Kirk as a birthday present is described as “2283”. However, “2283” could be a stardate, which would make the ale more than five years old.

In Star Trek III: The Search for Spock, the Vulcan’s death at the end of the previous film is said to have occurred on stardate 8128.7, according to the Enterprise’s flight recorder, but Star Trek II occurs during stardates 8130.3-8141.6. Either the ship’s log or its flight recorder must be out by about ten stardate units. I choose to believe that it is the flight recorder that is in error, because otherwise it would mean that both Saavik and Chekov (on board the Reliant) get their dates wrong independently. It is not unreasonable to suppose that the Enterprise’s flight recorder might not be quite up to specs, as the ship is only expected to be used for brief training cruises.

Admiral Kirk’s recap at the start of some versions of Star Trek IV: The Voyage Home refers to the stardate as 8031, which would place it before Star Trek II. However, I’m not convinced that this log entry is canonical, because Kirk also tells us that it is “the 23rd century” - who is he addressing that might not know what century it is? Rather, I see this log entry as non-canonical narration for the purposes of bringing uninitiated viewers up to date with the story so far. This recap was not included on all prints of the film, only on those shown in Europe and South America, and it has never been released in the USA. If you wish to accept this prologue as canon (perhaps Kirk refers to the century in case future generations discover the recording), then he simply makes a mistake with the date or the Klingon ship’s log recorder skips a digit and what he really means to say is stardate 8331.0.

On to The Next Generation, and in Encounter at Farpoint Data claims that he graduated from “Starfleet Class of ’78”, but the later episode The Neutral Zone reveals that the series takes place in the 2360s. I theorise that Data is referring to a class located on Starbase 78.

As I indicated earlier in this feature, the stardates used in TNG proved to be more organised than those used in previous series - but only after a shaky start. The numbers heard in the first season are all over the place. If you were to list these episodes in stardate order, then Tasha Yar would participate in several episodes after she has died in Skin of Evil (stardates 41601.3-41602.1). Dialogue also indicates that the episode 11001001 (41365.9) follows directly on from Datalore (41242.4-41242.5), though the stardates suggest otherwise. Other factors to be taken into consideration include references in Coming of Age (41416.2) to (amongst other episodes) The Battle (41723.9).

It is interesting to note that, in Coming of Age, the investigator Remmick states that he has discovered “several discrepancies” in Picard’s log entries. Could this be evidence that some stardates are less reliable than others? Then there’s the fact that the Enterprise computer receives an upgrade from the Bynars in 11001001. I believe that this could be partly prompted by glitches in the computer’s recording of stardates, as I suggested for the anomalous dates in The Animated Series.

My timeline places the affected episodes in what I believe to be a best-fit compromise, preserving as many of the transmitted stardates as possible while also taking into account production order where feasible. As with the Animated Series anomalies, those marked with strikethrough text have been adjusted by me, and are followed by suggestions for what the “true” stardates might be. This does leave quite a few episodes taking place between 41153.7 and 41365.9. This is because I am working on the assumption that the computer glitch is corrected shortly after the events of 11001001. The Last Outpost’s stardate must also be deemed unreliable, because it has to happen before The Battle, which itself must take place before Coming of Age.

In Dark Page, a diary entry referring to Lwaxana Troi’s marriage to Ian Andrew Troi, supposedly in the 2330s, has a stardate of 30620.1. Working backwards from the dates used elsewhere in TNG, that stardate would occur in the year 2353. Unless we assume that Betazoids grow up super-fast and that Deanna Troi is just ten years old in the first season of TNG, 30620.1 cannot be a true Federation stardate. Perhaps the planet Betazed has different stardates to the majority of the quadrant. Perhaps the Betazoids got tired of resetting the four-digit dates to zero every decade and so switched to their own five-digit system several years ahead of the rest of the Federation.

On to Deep Space Nine now, and in the episode Second Sight (stardate 47329.4), Captain Sisko claims that it is the fourth anniversary of the Battle of Wolf 359, which occurred in the two-part TNG story The Best of Both Worlds (43989.1-44001.4). However, going by the stardates, that’s a gap of little more than three years. Fortunately, it has been established that Deep Space Nine operates on Bajoran time, with 26 hours in each day, so it seems logical to apply this to years too. Therefore, Sisko could be referring to Bajoran years, which must therefore be about 300 Terran days long.

And talking of the Borg, in the episode In Purgatory’s Shadow, Sisko mentions the “recent Borg attack”, presumably the one depicted in Star Trek: First Contact (50893.5). However, in the very next instalment, By Inferno’s Light, a stardate of 50564.2 is logged, which would place In Purgatory’s Shadow before First Contact. It is possible that Sisko is referring to the Borg confrontation in William Shatner’s novel The Return, which probably occurred about a year and a half previously, between Star Trek: Generations (48632.4-48650.1) and The Way of the Warrior (49011.4).

The timeline that follows does not cover the entirety of Trek history. It deals only with the period from the birth of James T Kirk to the end of the first season of TNG. This is because, with the exception of Second Sight and In Purgatory’s Shadow, which are explained above, I don’t feel that any of the stardates after this period are in question.

Several broadcast episodes do not contain stardates. Some of these have been allocated stardates in other sources, such as reference guides and fotonovels - only a couple of which I have accepted. For instance, many sources suggest dates of 3134.0 and 2534.0 respectively for The City on the Edge of Forever and Patterns of Force. These dates are taken from early draft scripts of the episodes. However, these dates deviate significantly from the shows’ production order, so I have disregarded them in favour of production order. This way, we also avoid having two time-travel stories next to each other (City and Tomorrow is Yesterday).

Conversely, in his novel Q-Squared, Peter David suggests a stardate of 3823.7 for Mirror, Mirror, which I have taken on board because it does not conflict with the production order (unlike Diane Duane’s suggestion of 4428.9 in her novel Dark Mirror). Similarly, I have accepted the stardate that reference book authors have assigned to A Piece of the Action (4598.0), which is apparently based on an early script, because it still follows production order, taking place before By Any Other Name (4657.5). The fotonovel of this episode offers a concluding stardate of 4598.7.

Because most of the animated episodes occur in between episodes of the live-action series, I have distinguished their production codes with the letter “A”.

Timeline: circa 2230-2364

Circa 2230
Stardates commence or are reset to 0000.0
One year = about 900 stardate units at this point

Circa 2231
Stardate 1277.1: James Tiberius Kirk is born (Where No Man Has Gone Before)

Circa 2241
Stardates are reset to 0000.0

Circa 2242
Stardate 1087.7: Gary Mitchell is born (Where No Man Has Gone Before)
Stardate 1089.5: Elizabeth Dehner is born (Where No Man Has Gone Before)

Circa 2244
Stardate 2794.7: Governor Kodos of Tarsus IV slaughters more than 4,000 people (The Conscience of the King)

Circa 2252
Stardates are reset to 0000.0

#101 The Cage Stardate unknown

Circa 2263
Stardates are reset to 0000.0 and by now reflect the duration of individual ships’ and colonies’ missions
One year = about 1200 stardate units at this point

Stardate 1116.4: Harcourt Fenton Mudd’s master’s licence to operate a ship is revoked (Mudd’s Women)

#102 Where No Man Has Gone Before Stardate 1312.4-1313.8
Stardate circa 1320.0: the Enterprise’s stardates are suspended during its repairs and refit

#104 Mudd’s Women Stardate 1329.8 1328.9-1330.1
#103 The Corbomite Maneuver Stardate 1512.2-1514.1
#106 The Man Trap Stardate 1513.1-1513.8 1530.1-1530.8
#108 Charlie X Stardate 1533.6-1535.8
#105 The Enemy Within Stardate 1672.1-1673.1
#107 The Naked Time Stardate 1704.2-1704.4
#109 Balance of Terror Stardate 1709.2-1709.6
#119 The Squire of Gothos Stardate 2124.5-2126.3

#110 What are Little Girls Made of? Stardate 2712.4
#112 Miri Stardate 2713.5-2717.3
#111 Dagger of the Mind Stardate 2715.1-2715.2 2750.1-2750.2
#113 The Conscience of the King Stardate 2817.6-2819.8
#114 The Galileo Seven Stardate 2821.5-2823.1
#115 Court Martial Stardate 2947.3-2950.1
#116 The Menagerie, Part I Stardate 3012.4-3012.6
#117 The Menagerie, Part II Stardate 3013.1-3013.2
#201 Catspaw Stardate 3018.2
#118 Shore Leave Stardate 3025.3-3025.8
#120 Arena Stardate 3045.6-3046.2
#121 The Alternative Factor Stardate 3087.6-3088.7
#122 Tomorrow is Yesterday Stardate 3113.2-3114.1
#125 Space Seed Stardate 3141.9-3143.3
#123 The Return of the Archons Stardate 3156.2-3158.7
#124 A Taste of Armageddon Stardate 3192.1
#127 The Devil in the Dark Stardate 3196.1
#128 Errand of Mercy Stardate 3198.4-3201.7
#217 The Gamesters of Triskelion Stardate 3211.7-3212.2
#202 Metamorphosis Stardate 3219.8-3220.3
#129 The City on the Edge of Forever Stardate unknown
#130 Operation -- Annihilate! Stardate 3287.2-3289.8
#205 Amok Time Stardate 3372.7
#126 This Side of Paradise Stardate 3417.3-3417.7
#204 Who Mourns for Adonais? Stardate 3468.1
#211 The Deadly Years Stardate 3478.2-3579.4 3479.4
#203 Friday’s Child Stardate 3497.2-3499.1
#208 The Changeling Stardate 3541.9
#206 The Doomsday Machine Stardate unknown (Constellation log: 4202.1)
#207 Wolf in the Fold Stardate 3614.9-3615.4
#218 Obsession Stardate 3619.2-3620.7
#209 The Apple Stardate 3715.0-3715.6

#210 Mirror, Mirror Stardate 3823.7
#215 Journey to Babel Stardate 3842.3-3843.4
#214 Bread and Circuses Stardate 4040.7-4041.7
#A11 The Slaver Weapon Stardate 4187.3
#216 A Private Little War Stardate 4211.4-4211.8
#219 The Immunity Syndrome Stardate 4307.1-4309.4
#302 Elaan of Troyius Stardate 4372.5
#301 Spectre of the Gun Stardate 4385.3
#212 I, Mudd Stardate 4513.3
#213 The Trouble With Tribbles Stardate 4523.3-4525.6
#220 A Piece of the Action Stardate 4598.0-4598.7
#221 By Any Other Name Stardate 4657.5
#224 The Ultimate Computer Stardate 4729.4-4731.3
#222 Return to Tomorrow Stardate 4768.3-4770.3
#223 Patterns of Force Stardate unknown
#225 The Omega Glory Stardate unknown
#226 Assignment: Earth Stardate unknown
#303 The Paradise Syndrome Stardate 4842.6-4843.6

#A08 Mudd’s Passion Stardate 4978.5
#304 The Enterprise Incident Stardate 5027.3-5027.4
#305 And the Children Shall Lead Stardate 5029.5 (Triacus log: 5025.3-5038.3)
#A09 The Magicks of Megas-Tu Stardate 1254.4 circa 5100.0
#308 The Empath Stardate 5121.5
#A05 The Survivor Stardate 5143.3-5148.7
#A04 Beyond the Farthest Star Stardate 5221.3-5221.8
#A10 The Time Trap Stardate 5267.2-5267.6
#A18 Albatross Stardate 5275.6-5276.8
#A07 One of Our Planets is Missing Stardate 5371.3-5372.1
#A03 Yesteryear Stardate 5373.4-5373.9
#A01 More Tribbles, More Troubles Stardate 5392.4
#317 The Mark of Gideon Stardate 5423.4-5423.8
#306 Spock’s Brain Stardate 5431.4-5432.3
#310 For the World is Hollow and I Have Touched the Sky Stardate 5476.3-5476.4
#311 Day of the Dove Stardate unknown
#A06 The Lorelei Signal Stardate 5483.7-5483.9
#A12 The Ambergris Element Stardate 5499.9-5506.2
#A02 The Infinite Vulcan Stardate 5554.4-5554.8
#A14 The Terratin Incident Stardate 5577.3-5577.7
#A15 The Eye of the Beholder Stardate 5501.2 circa 5585.0
#A16 Once Upon a Planet Stardate 5591.2
#307 Is There in Truth no Beauty? Stardate 5630.7-5630.8
#A13 The Jihad Stardate 5683.1
#309 The Tholian Web Stardate 5693.2
#313 Wink of an Eye Stardate 5710.5-5710.9
#314 That Which Survives Stardate unknown
#316 Whom Gods Destroy Stardate 5718.3
#318 The Lights of Zetar Stardate 5725.3-5725.6
#315 Let That Be Your Last Battlefield Stardate 5730.2-5730.7
#312 Plato’s Stepchildren Stardate 5784.2-5784.3
#319 The Cloud Minders Stardate 5818.4-5819.3
#320 The Way to Eden Stardate 5832.3-5832.6
#321 Requiem for Methuselah Stardate 5843.7-5843.8
#322 The Savage Curtain Stardate 5906.4-5906.5
#324 Turnabout Intruder Stardate 5928.5-5930.3
#323 All Our Yesterdays Stardate 5943.7-5943.9
#A20 The Practical Joker Stardate 3183.3 circa 6000.0
#A21 How Sharper Than a Serpent’s Tooth Stardate 6063.4-6063.5

#A19 The Pirates of Orion Stardate 6334.1-6335.6
#A22 The Counter-Clock Incident Stardate 6770.3-6770.6
#A17 Bem Stardate 7403.6
Stardate circa 7410.0: the Enterprise’s stardates are suspended during its refit

Star Trek: The Motion Picture Stardate 7410.2-7414.1

Circa 2274
Stardates are reset to 0000.0 and synchronised throughout the Federation
One year = about 1050 stardate units at this point

Star Trek II: The Wrath of Khan Stardate 8130.3-8141.6
Star Trek III: The Search for Spock Stardate 8210.3
Star Trek IV: The Voyage Home Stardate 8031.0 8331.0, 8390.0
Star Trek V: The Final Frontier Stardate 8454.1

Circa 2284
Stardates are reset to 0000.0

Star Trek VI: The Undiscovered Country Stardate 9521.6-9529.1
Star Trek: Generations (23rd-century scenes) Stardate unknown

Circa 2294
Stardates are reset to 0000.0

Circa 2303
Stardates are reset to 0000.0

Circa 2313
Stardates are reset to 0000.0 (except on Betazed, which switches to its own five-digit system: 10000.0)

Circa 2322
Stardates are reset to 00000.0
Stardates are five figures long from now on
One year = 1000 stardate units from this point on

Circa 2333
Stardate 30620.1 (Betazed stardate, still on the 2303 reset): Lwaxana Troi makes a diary entry regarding her marriage to Ian Andrew Troi (Dark Page)

Stardate 23859.7: The Khitomer Massacre (Sins of the Father)

#101-102 Encounter at Farpoint Stardate 41153.7-41174.2
#103 The Naked Now Stardate 41209.2-41209.3
#104 Code of Honor Stardate 41235.2-41235.3
#108 Lonely Among Us Stardate 41249.3-41249.4
#109 Justice Stardate 41255.6-41255.9
#106 Where No One Has Gone Before Stardate 41263.1-41263.4
#107 The Last Outpost Stardate 41368.4-41368.5 circa 41280.0
#105 Haven Stardate 41294.5-41294.6
#112 Too Short a Season Stardate 41309.5
#110 The Battle Stardate 41723.9 circa 41320.0
#113 The Big Goodbye Stardate 41997.7 circa 41330.0
#115 Angel One Stardate 41636.9 circa 41340.0
#121 The Arsenal of Freedom Stardate 41798.2 circa 41350.0
#114 Datalore Stardate 41242.4-41242.5 circa 41360.0
#116 11001001 Stardate 41365.9
#119 Coming of Age Stardate 41416.2
#117 Home Soil Stardate 41463.9-41464.8
#120 Heart of Glory Stardate 41503.7
#118 When the Bough Breaks Stardate 41509.1-41512.4
#111 Hide and Q Stardate 41590.5-41591.4
#123 Symbiosis Stardate unknown

#122 Skin of Evil Stardate 41601.3-41602.1
#124 We’ll Always Have Paris Stardate 41697.9
#125 Conspiracy Stardate 41775.5-41780.2
#126 The Neutral Zone Stardate 41986.0

And the adventure continues...

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