There is no definitive evidence for the exact date of the Prophet Muhammad's (peace be upon him) birth, though there is a greater chance it was on the 2nd, 8th, or 10th rather than the commonly cited 12th of Rabi al-Awwal. The only known detail about the time is that he was born around noon. When his mother Amina carried him, she saw a light emanating from her body that reached as far as Busra in Syria. No one witnessed the actual birth. The full lecture providing more context can be found at the provided YouTube link.