i call cheating!!!
Everyone and theyr mothers know that Rome was really born the day that troy fell, its the event that started it all with enea's journey, didone's revenge and stuff. As such i ask for that to be the starting day!
on a more serious note, may i ask why are u using a non canonical fake convention for the year?
Its not like it was an used convention in Rome, we didnt use that... we used to call years by the name of our consuls or emperors, like all civilized peeps should do
Even if you're playing as Rome, the underlying engine needs to have years run in numbers.
There's no guarantee that your Rome will be using the consular system, or an Imperial one. Other systems may apply.
If you *are* using consular dates, then your consuls almost certainly will not match historical ones.
It's difficult to give future dates in a system named or number after people who aren't yet in office. Yes, you can give "this building will complete in X years, Y months", but that's harder to keep track of mentally than "this will complete on XX/YY/ZZZZ", leading to you being more likely to have to keep checking back.
There's also a possibility of a year having multiple names, not just across multiple countries, but even within just one. If you're a consular republic that forms a dictatorship (meant to be for a limited period), and then gets overthrown by a revolt into an Imperial style monarchy, then that year has potentially three names (the year of the consuls X & Y, The year of the dictator Z, and the first year of the Emperor A).
Displaying a day/month/year calendar is also more convenient from a graphic interface point of view than having to arrange for it to be able to contain two full three (or more!) part Latin names of effectively arbitrary length.
It prevents you from having calculations accidentally involve negative dated years. Something that references 20 years ago can simply use (date-20) years as the reference, rather than having to look up what that year would be called and then squeeze that into a text box along with the rest of the event text.
It's also kind of handy to have everyone looking at the same calendar, even if it isn't precisely an accurate or historical one.