was but a historian and he did not really put up any significant proof of this Claim. But as always Allah knows Best when
exactly was his Birthday.Also even if it was the 12 Rabi' al-awwal that he was born, He never celebrated it Himself so
I wouldn't reccomend celebrating it with some big party or anything. But some more Ibaadah than usual I guess couldn't hurt.
But Allah always Knows Best.