The things people say to sell their car LOL...

Well if you read the ad, it reads as if not only the Julian Date is there but also the partial VIN. Was there a second place on these engines for the partial VIN? I was not aware of such.

I have never heard of there being a Julian date on the motors. But then I don't know everything yet.
Just sounds like a bunch of crap to me.
Never heard of the 10,000 day calendar being used on a motor either but it is used on Transmissions in some cases.