1300 AD is as old as 500 BC? And I'll be forced to accept this?
Now, now! Let's not be losing our heads over such a minor matter.
Keep perspective: what is an 1800 year discreapancy in the entire scheme of history?
Keep your head, and accept it; or deny it, and lose your head...there is no compulsion in religeon or learning, since the choice is entirely up to you.