Hi everyone. I haven't been able to post very much because of school and such, but I decided to visit. Although I can't really answer your question Rogan, I hope this helps.
The years in Cythera were measured since their arrival. The only reference of time to the period during which they lived on the island Thera I could find was "Pre-Cytheric Times".
I believe they marked the year of their arrival on Cythera as 0 A.T. and Cademia was founded on their fifth year, 5 A.T. This was also the time that one of the priests was made the First Tyrant who had absolute power. This first tyrant seems to have been a benevolent and just ruler.
The first tyrant died in 79 A.T. and was replaced by the Second Tyrant who ruled from 79 A.T. to 160 A.T. This Tyrant was much more ruthless and paranoid. Important things to note during this time frame was the Exile of the Mages and the Foundingof Pnyx.
It was during the period of the Third and final tyrant(160-216 A.T.) that the city of Abydos was mysteriously destroyed. Also, the Cult of Scylla rose and was destroyed during this time.
Alaric made his appearance in 216 A.T. and killed the tyrant. In the year 219 A.T, Alaric brings back the mages and the current system of government is created. Later in 303 A.T. Kosha is founded.
The game seems to take place around or after the year 901 A.T., but probably not before..
I hope that provides some reference points for you to use. I really can't remember any of the TSes I've been in and don't know any of the recent ones so I can't really give you specific information that I know would help you.
I do have some more specifics that I could give you if you would like to know more.
If you don't see me reply to your post, email me at (url="http://"mailto:J_Ace21@freechal.com")mailto:J_Ace21@freechal.com(/url)J_Ace21@freechal.com