This dating still does not make sence to me.
Voyager is a 7 years series. the star date of the first episode is 48315.6 the star date of the last episode of the first year was 48846.5
the star date of the first episode of the last season is 54014.4 and the star date of the last episode in season seven was 54973.4
if you take one day for each star day it is a total of 6658 days that is roughly equal to 18.24 years
as for the first number being the century the first season (I think) was 2372 so seven years would not account for it going to five. and the second number being the season number the first season the second number is an 8 and in the last it is a 4 and as for the last three numbers many of them are in the 400's 500's 600's 700's 800's 900's .
I think that they just made them up and I do not know why they tried to make everything as real as possible. they made up languages insted of the actors just making up blabber. they explain everything with the science as best as possible but something as simple like with the dates they messup.
I have seen interview after interview all of them saying that the fans of TREK are intelligent so they wanted to make the best show possible. So after going to all of that trouble do they not think that we can count.
Or is it possible that after Rodenberry died that mistakes started to happen.