The Importance of Sufar

One opinion says the announcement for the Hidra came in Muharram. There is some reports that in which Earthman expresses a reason and Allah knows best. Later scholars tried to read in a Quranic evidence for this being the first of the Hijra right. But nonetheless so they're saying Allah says the first day min awaliyawu or when did it take place after Hajj? The Prophet always said Rabial al-Awul. Sufar. Shahwal is after Ramadan right. And when did they arrive in Medina? Around 8th or 9th of Rabial al.-Awul exactly you see.