Jewish Years

Moses

I answered prematurely. I should have asked you to clarify your question. What about Abraham and Moses? Neither of them started the Hebrew calendar.

Perhaps if you go to this Wikipedia article on the Hebrew Calendar, you'll get your answer.
http://en.wikipedia.org/wiki/Hebrew_calendar

"The Jewish calendar uses a calendar era anno mundi ("in the year of the world"), abbreviated AM. Interestingly, the beginning of "year 1" is not Creation, but about one year before Creation. "

The date of year 1 alleges to be the beginning of Creation of the world

Is there such a thing as Before creation (B.C.) dates: that would be wonderfully ironic.

It's BCE (Before the Common Era), actually.