Well, the Hijri date 29 Shaban 1231 corresponds to the Gregorian date Wednesday, 24 July 1816. This date lies in the eighth month of the Hijri year 1231 AH, which is Shaban of 1231 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1231/08/29 is calculated using the Umm Al-Qura calendar and the sighting of the moon. One thing to remember is that this Arabic date may occur on different Gregorian date depending upon the region and country and obviously the moon.
If you are still not sure about the date then you can use our Arabic date converter.
The following is the conversion of the Gregorian date 24 July 1816 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Shaban 1231 AH to its equivalent Gregorian date.
بَلْ بَدَا لَهُم مَّا كَانُوا۟ يُخْفُونَ مِن قَبْلُ ۖ وَلَوْ رُدُّوا۟ لَعَادُوا۟ لِمَا نُهُوا۟ عَنْهُ وَإِنَّهُمْ لَكَٰذِبُونَ
Nay, but that hath become clear unto them which before they used to hide. And if they were sent back they would return unto that which they are forbidden. Lo! they are liars.
Surah Al-An'aam(6:28)