As I have said in previous posts 36 on page 2 and 173 on page 9 of this thread, there are only about a half a dozen Earth dates in all of the
Star Trek productions made before
Star Trek (2009) which are specified to be dates AD or BC, and none are specified as CE or BCE which are the same as AD and BC but with different names. Thus any Earth date given in any of those hundreds of
Star Trek productions might count the years from a different epoch or era than the
Anno Domini dating system does.
And why would anyone want to make use of the freedom to imagine that the Earth dates given in various
Star Trek productions might possibly be counted from a different epoch than January 1, AD 1? Making use of such freedom would certainly make
Star Trek chronology more complicated.
Because assuming that all Earth dates given in various
Star Trek productions must be in the same calendar, let alone one that counts years from the epoch of January 1, AD 1 doesn't add up. There are too many contractions in dates. There have to be several different dating systems counting time from different epochs used in various
Star Trek productions.
"Where No Man Has Gone before" opens with:
Captain's log, Star date 1312.4. The impossible has happened. From directly ahead, we're picking up a recorded distress signal, the call letters of a vessel which has been missing for over two centuries. Did another Earth ship once probe out of the galaxy as we intend to do? What happened to it out there? Is this some warning they've left behind?
I note that if Spock heard Kirk make that log entry, and if that log entry was incorrect, Spock would probably have corrected Kirk.
Later Kirk addresses the crew on the Intercom:
KIRK: This is the Captain speaking. The object we encountered is a ship's disaster recorder, apparently ejected from the S.S. Valiant two hundred years ago.
That is how the Star trek transcripts site quotes Kirk. But listening to the episode, I seem to hear Kik say "ejected from the S.S. Valiant almost two hundred years ago.".
And whether Kirk says "two hundred years" or "almost two hundred years" when addressing the crew, Spock doesn't correct him. So what Kirk said should have been close enough to the correct and accurate number of years for Spock to consider it within the usual human range of precision and thus not inaccurate enough to be worth correcting.
Later Gary Mitchell demonstrates his memory to Dr. Dehner by quoting from a specified page in a book he had been reading:
MITCHELL: My love has wings. Slender, feathered things with grace in upswept curve and tapered tip. The Nightingale Woman, written by Phineas Tarbolde on the Canopius planet back in 1996. It's funny you picked that one, Doctor.
DEHNER: Why?
MITCHELL: That's one of the most passionate love sonnets of the past couple of centuries. How do you feel, Doctor?
If Mitchell said that 1996 was in the last century, the date of "Where No Man Has Gone before" would be sometime between 1996 TM and 2096 TM - TM standing for the Tarbolde-Mitchell calendar. But since Mitchell said "the past couple of centuries" the date of "Where No Man Has Gone before" must be sometime between 2096 TM and 2196 TM.
If "Where No Man Has Gone before" must be sometime between 2096 TM and 2196 TM, then 200 years earlier must be sometime between 1896 TM and 1996 TM, and the S.S. Valiant must have been deep in interstellar space sometime between 1896 TM and 1996 TM - no wonder that Mitchell could claim that Tarbolde (usually presumed to be an Earthman) was on the distant Canopius Planet in 1996 TM.
There are other dates given in the episode that might be either years or stardates.
Mitchell's records, seen onscreen state that Mitchell was born in a city or other place called Eldman on 1087.7, while Dr. Dehner's records, also seen onscreen, say she was born in a city or other place called Delman on 1089.5.
If those dates are given in years and if those years are counted from the same epoch as Tarbolde-Mitchell years, then Gary Mitchell and Elizabeth Dehner should be about 1008.3 to 1108.3 years and 1006.5 to 1106.5 years old, respectively, in WNMHGB.
If those dates are given in years in a different calendar than the Tarbolde-Mitchell calendar - call it the Eldman-Delman or ED calendar - and if both the TM and ED calendars use years the same length as Earth years, and If Gary Mitchell and Elizabeth Dehner are about 20 to 40 Earth years old, as they look, then the year of WNMHGB should be between 2096 and 2196 TM and also between about 1109.5 ED and about 1127.7 ED. Thus the epoch and year one of the ED calendar would be about 968.3 to 1086.5 TM.
There are other dates in WNMHGB. The tombstone Mitchell makes for Kirk says: "James R. Kirk C 1277.1 to 1313.7" or possibly the last number was 1818.7.
It is possible that both numbers are years (making Kirk live 36.6 to 541.6 of those years), or the first number is a year and the second a stardate, or the first number is a stardate and the second a year, or that both numbers are stardates (making Kirk, live, or command, or whatever for 36.6 to 541.6 of those stardates).
If the second number is a year in the ED calendar, Gary Mitchell would be about 226 to 731, and Elizabeth Dehner about 224.2 to 729.2, ED years old, thus making ED years much shorter than Earth years unless something kept Mitchell and Dehner young and alive for centuries.
Possibly the birth dates of Mitchell and Dehner are given in stardates. Their files are seen between stardates 1312.9 and 1313.1, and thus when Mitchell would be about 225.2 to 225.4, and Dehner 223.4 to 223.6, stardate units old.
It may be noted that the tombstone which has a second number that is 1313.7, or 1318.7, or 1813.7, or 1818.7, is made sometime between stardates 1313.3 and 1313.8. Thus it is logical to assume that the second number on the tombstone is stardate 1313.7.
But if the second number on the tombstone is a year 1313.7 to 1818.7, and if the years are the same length as the TM years, the year one and epoch of the Kirk Tombstone (or KT) calendar should be about 277.3 TM to 882.3 TM.
Thus WNMHGB, intentionally or otherwise, gives viewers a lot to think about the calendar system(s) and stardate system(s) of its society.
http://www.chakoteya.net/StarTrek/2.htm
Thus it is possible that WNMHGB shows the use of one, two, or three different (Earth?) calendars at the same time. If there are three separate year counts used in WNMHGB, and the year lengths are the same, the year one and epoch of the KT calendar would be about 277.3 TM to 882.3 TM, and the year one and epoch of the ED calendar would be about 968.3 to 1086.5 TM.
And some people will object that people often casually say "a couple" to mean "a few" instead of "a pair" or "two". Thus WNMHGB could be as much as maybe 500 years after 1996 TM and thus sometime between 2096 TM and 2496 TM.
But as a general rule, fictional characters don't talk as poorly as real people do.
And fictional characters tend to be especially precise and accurate when their words, spoken for other purposes, happen to inform the readers and viewers about important fictional data the readers or viewers wouldn't know any other way.
And fictional character tend to be even more precise and accurate when their words, spoken for other purposes, happen to inform the readers and viewers about important fictional data about a setting that is so remote in time and space that the readers or viewers don't have any other way to learn about it.
In a story set on Earth in the 2018, just last year, it doesn't matter much if a fictional character tells another character than Emperor Basil II the Bulgar Slayer finished conquering Bulgaria a century ago. If the reader is interested enough they can look it up and seen that Basil conquered Bulgaria a millennium ago instead of a century ago, and thus deduce that the fictional character said a century when a millennium, was correct, and perhaps deduce things about the speaker.
And similarly if someone in a present day story says that Emperor Basil II died thousands of years ago it is easy enough to look up that Basil II died only 994 years ago in AD 1025 and thus the character exaggerated a lot.
And it doesn't matter much if in a story set in 2019 a character says that Custer's Last Stand was the most humiliating defeat of the US army in the last century. If the reader or viewer is interested enough they can look up the Little Bighorn and learn that Custer's Last Stand was actually a humiliating defeat for the US army in the last two - or couple of - centuries.
The episode "Magic in the Air" (Julu 15, 2018) of the fantasy series
The Bureau of Magical Things had the protagonists chasing a levitating chair, the Flying Throne of Kay Kavus. Professor Maxwell dates the Flying Throne, and thus Kay Kavus or Kai-Kaus, to the first millennium. Presumably Maxwell means the first millennium after Christ, or AD 1 to 1000.
Since
The Bureau of Magical Things is set on Earth in the present, that is no problem. Any interested viewer can look up the legendary Kai-Kaus, and find out that nobody knows for sure when he would have lived if he was real, but it was sometime during the first, or possibly second, millennium BC, and also before the Achaemenid Dynasty and the First Persian Empire (c. 550-330 BC). So it is easy to learn that Maxwell's date was off by about 550 to 3,000 years and that Maxwell is careless with historic dates.
Similarly the "My Fair Pharaoh"/"The Power" (10 May 1980) episode of
Fantasy Island won't mislead any viewer interested in looking up the historical Cleopatra and her family. Such an interested viewer would learn that Cleopatra VII, Queen of Kings, lived from c.69-30 BC and Marc Anthony lived from 83-30 BC, and that they were involved from about 41 to 30 BC. Cleopatra's enemy Ptolemy is portrayed by Michael Ansara (15 April 1952-13 July 2013) who was 58 years and 25 days old when the show aired. Thus the episode's Ptolemy would have been born about 99 to 88 BC and might have been about as old as Ptolemy XII, Cleopatra VII's father, who was never her enemy. The only Ptolemy who was ever Cleopatra's enemy was her brother Ptolemy XIII (62/61 - 47 BC) who only lived to be a quarter as old as the episode's Ptolemy and and was probably much more likable.
Thus any viewers who were interested enough could quickly learn how much that episode slandered Ptolemy XIII.
But in a story set in a far off and fictional time and place, where the reader or viewer can't look up any information about the setting, everything that characters say about the setting has to be either correct or proven wrong later to prove a plot point. Since the readers or viewers only know what they are told about the setting everything that the characters say about the setting has to be correct to avoid misleading the readers or viewers, unless it is planned to reveal that some of the characters are lying or misinformed.
Therefore, when a fictional character mentions "a couple of centuries" when talking about fictional history, they must mean "a pair of centuries" and not "a few centuries".
And the second pilot for
Star Trek has already given a date range in one calendar which is inconsistent with TOS happening during the 23rd century of that calendar. Thus any canonical statement that TOS is in the 23rd century would have to be the 23rd century in a different calendar than any calendar used in WNMHGB, which would prove that at least two different calendars are used in various
Star Trek productions, which would prove that it is unwise to assume that any particular
Star Trek date is an
Anno Domini date - including any 23rd century date for TOS.