Conveniently leaving out the year lining up to the younger dryas period huh, I wonder why..

Everything is fictional if you don’t know the facts. We’re talking about a time where extremely little was written down, let alone maintained and kept for todays world to see and understand. You can make your presumptions and perhaps are more likely to be correct than I, but there could be more to this, such as the timespan being in line with the younger dryas in the story, a crazy incredible coincidence?

What relevance does that hold here?

Its not well established he made it up, he claims to have heard it from a distant relative who had travelled to Egypt. To say it is well established as made up is a farce based on incomplete data