Earlier quoted context omitted.
Maybe Quintilis, Sextilis, September, October, November and December were the seventh, eight, ninth, tenth, eleventh and twelfth months of the year through all of the “recorded Roman history”. But it seems well accepted that they were once the fifth, sixth, seventh, eight, ninth and tenth months of the year.
In retrospect, I probably shouldn't have referred to it as a legend. That seems to have negative connotations for most people that I didn't mean to convey. I really don't doubt the authenticity of the story, I mainly was trying to indicate that we don't know when the change occurred but it certainly happened a long time before Caesar: by his day, the change was an oral tradition whose full story was lost in the very…
Not just "for most". It has negative connotations (of the kind reffered to here) for all people.
"Legend" connotes "didn't take place".