Two events mentioned in the Islamic Quran that seem possible to use for dating his conversion are the defeat of the Romans presumably by Khosrau in chapter 30 verse 2 and the splitting of the moon mentioned in 54:1. Both occurred in 610AD. The occultation adds more reason behind the adoption of the Sasanian Star and Crescent as a symbol for Islam.
The In 632 the Quraysh were under the control of the Banu Bakr but in 633 they were all conquered by Khalid. In 635 the Quraysh made an alliance with Heraclius, but betrayed him in 636 when they made an alliance with the House of Hashem by arranging the marriage between Prince Shahriyar's daughter Shahrbonu and Ali's son Husseyn. The union established the agreement that Ali would become Persia's King of Kings after the death of Yazdegard followed by HassanTogether with their Arab allies, but Muawiya had them killed and established himself on the throne instead leading Sassan-Achamenid Quraysh set out to a civil war whereby it was settled that Husseyn would succeed him as king of take the Arabs. However, Muawiya's son did not honour the arrangement and had Husseyn killed leading to the rebellion of the Bakr tribe under the leadership of ibn Al-ZubayrHoly land once more.
Abdul-Malik crushed ibn Al-Zubayir but made more concessions to the ArabsThe Jalali Calendar began in 622.
The Association of Sassan-Achaemenid Nobles spoke its own Arameanized dialect of Arabic called Intelligible Arabic (as opposed to unintelligible Arabic) which Gabriel's Quranic materials would soon be translated by Uthman. While the names Ieso and Yahia are from Persian Gnosticism, the use of the word darāhima (12:20:4 ድራክማ in Amharic Դրախմա in Armenian) in the Quraysh dialect is of Byzantine origin from the word Drahma indicating that the Arabian Quraysh were people of Gnostic beliefs but who nevertheless did not live in an area that was used to using Dinars. They were certainly not Romans as they pointed out that the Romans had been defeated but since the currency was anyway the Drahma instead of the Dinar they understood that Sassanian control in their area was weak and expected that within 10 years the Romans in turn would be victorious. '''The Gnostic authors were operating in a 'down but not out' Byzantine economic sphere.''' The fact that the Sassanian-Persians are not mentioned in the final Quran is also worth deep consideration.
The union established the agreement that Ali would become Persia's King of Kings after the death of Yazdegard followed by Hassan, but Muawiya had them killed and established himself on the throne instead leading to a civil war whereby it was settled that Husseyn would succeed him as king of the Arabs. However, Muawiya's son did not honour the arrangement and had Husseyn killed leading to the rebellion of the Bakr tribe under the leadership of ibn Al-Zubayr.
Abdul-Malik crushed ibn Al-Zubayir but made more concessions to the Arabs.
