Augustus
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I never said they were unreliable in terms of getting the general history right.
Such as splitting the moon, flying donkeys, important trading and pilgrimage centres that no one else in the region actually notices and texts aimed at backwater "pagans" that assumes a high degree of Biblical literacy?
Basically it's reliable when it suits you, and unreliable when it doesn't
If you're aware of any sources that claim the Hijra was not in 622 (I don't care if it was September 24 or not) or thereabouts, then present them.
You miss the point. It's not about the dating, it is about what the date actually refers to: What was the hijra?
Every single source I've used agrees to a similar chronology.
If you only read orthodox Islamic theology from the 9th C onwards instead of secular critical history then it's probably why you don't understand the difference.
If you want to know how reliable chronology was before they agreed on an orthodox narrative centuries later:
According to various Muslim sources Muhammad "was born in the Year of the Elephant, or fifty days after the attack of the troops of the Elephant, or thirty years after the Year of the Elephant, or forty years after the Year of the Elephant Many traditions are recorded in Ibn N~ al-Din's Jami' al-iithiu, fols. 179b-180b:the Prophet was born in the Year of the Elephant, he received the Revelation forty years after the Elephant (The fight at - K.) 'Ukaz took place fifteen years after the Elephant and the Ka'ba was built twenty-five years after the Elephant; the Prophet was born thirty days after the Elephant, or fifty days, or fifty-five days, or two months and six days, or ten years; some say twenty years, some say twenty-three years, some say thirty years, some say that God sent the Prophet with his mission fifteen years after the Ka'ba was built, and thus there were seventy years between the Elephant and the mission (mab'aJh) of the Prophet; some say that he was born fifteen years before the Elephant, some say forty days or fifty days, some say thirty years before the Elephant, and finally, some say that there were ten years between the expedition of the Elephant and the mission"
He's trying to impress you with his book larnin'.
Yes, yes, secular scholarship is bad, much better to misinformed or ignorant.