Well, the Hijri date 12 Ramadan 1191 corresponds to the Gregorian date Monday, 13 October 1777. This date lies in the ninth month of the Hijri year 1191 AH, which is Ramadan of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1191/09/12 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 13 October 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Ramadan 1191 AH to its equivalent Gregorian date.
وَلَقَدْ أَرْسَلْنَا نُوحًۭا وَإِبْرَٰهِيمَ وَجَعَلْنَا فِى ذُرِّيَّتِهِمَا ٱلنُّبُوَّةَ وَٱلْكِتَٰبَ ۖ فَمِنْهُم مُّهْتَدٍۢ ۖ وَكَثِيرٌۭ مِّنْهُمْ فَٰسِقُونَ
And We verily sent Noah and Abraham and placed the prophethood and the scripture among their seed, and among them there is he who goeth right, but many of them are evil-livers.
Surah Al-Hadid(57:26)