I created this timeline because I am running a RPG and I thought it would be helpful to know how long ago a given event took place. Hence I titled it a “practical” timeline of TOS/TAS. It’s not canon, it’s more headcanon, but even in my head it’s not canon, if you know what I mean. It’s just close enough to make sense, while not too rigorous as to make the project un-fun.
For TOS, I based the dates on the first filmdate of the episode (I ignored the stated Stardate). I then expanded the passage of time by a certain factor. I then added in a gap between Court Martial and The Menagerie, since it seems in the latter they return to Star Base 11 after some time away. A second gap accounts for the time that lapses within The Paradise Syndrome. The expansion factor and the gap lengths were somewhat arbitrary but allowed me to sync up some things in a way which tickle my fancy. Some additional considerations are noted.
The date of The Cage is not based on filmdate at all, but necessarily dated in relation to The Menagerie.





For TAS, the plan is to follow ADF’s novelizations. Since he has gone to the work of weaving a consistent story, I might as well stick with it. This is somewhat of a work in progress, however, as I need to actually read those books rather than rely on the scant info I could find on the internet.
I am somewhat agnostic as to what the actual range of years should be. As with my SFTM Timeline, I have created variations of the above timeline calculated such that Errand of Mercy takes place in the year 2208, 2261, 2267, and 2556, respectively, as established in the various canons. (I kind of like them all.)
For TOS, I based the dates on the first filmdate of the episode (I ignored the stated Stardate). I then expanded the passage of time by a certain factor. I then added in a gap between Court Martial and The Menagerie, since it seems in the latter they return to Star Base 11 after some time away. A second gap accounts for the time that lapses within The Paradise Syndrome. The expansion factor and the gap lengths were somewhat arbitrary but allowed me to sync up some things in a way which tickle my fancy. Some additional considerations are noted.
The date of The Cage is not based on filmdate at all, but necessarily dated in relation to The Menagerie.





For TAS, the plan is to follow ADF’s novelizations. Since he has gone to the work of weaving a consistent story, I might as well stick with it. This is somewhat of a work in progress, however, as I need to actually read those books rather than rely on the scant info I could find on the internet.
I am somewhat agnostic as to what the actual range of years should be. As with my SFTM Timeline, I have created variations of the above timeline calculated such that Errand of Mercy takes place in the year 2208, 2261, 2267, and 2556, respectively, as established in the various canons. (I kind of like them all.)