Well, the Hijri date 9 Shaban 1191 corresponds to the Gregorian date Thursday, 11 September 1777. This date lies in the eighth month of the Hijri year 1191 AH, which is Shaban of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1191/08/09 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 11 September 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Shaban 1191 AH to its equivalent Gregorian date.
وَأَمَّا مَنْ أُوتِىَ كِتَٰبَهُۥ بِشِمَالِهِۦ فَيَقُولُ يَٰلَيْتَنِى لَمْ أُوتَ كِتَٰبِيَهْ
But as for him who is given his record in his left hand, he will say: Oh, would that I had not been given my book
Surah Al-Haaqqa(69:25)