I know about how silly CE is compared to AD but at least it is a right step toward eliminating religion's influences on our lives. Hopefeully, religions will fade away in next hundreds of years or so.
However, it is not about real life religion but rather about how the game is coded. See, if other religion in a game become a dominant force, should not it be given a dating honor?
Answer:
yes.
Practical answer:
no.
Better to remove dates from the screen in the first place for above and other reasons I described.
However, it is so minor a thing that I'm surprised you even bothered listening to complaints from either side anyway. You could had told "dates are messed up" complainers to go **** off in polite way and realize that it is extremely difficult to calibrate dates because of variability in games played. Then it would had been settled for once and all.
You already have a very good reputation for a very superb mod that the complainers would had been slightly offended but moved on anyway

.