Well, the Hijri date 6 Shawwal 1191 corresponds to the Gregorian date Thursday, 6 November 1777. This date lies in the tenth month of the Hijri year 1191 AH, which is Shawwal of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1191/10/06 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 6 November 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 6 Shawwal 1191 AH to its equivalent Gregorian date.
قَدْ نَعْلَمُ إِنَّهُۥ لَيَحْزُنُكَ ٱلَّذِى يَقُولُونَ ۖ فَإِنَّهُمْ لَا يُكَذِّبُونَكَ وَلَٰكِنَّ ٱلظَّٰلِمِينَ بِـَٔايَٰتِ ٱللَّهِ يَجْحَدُونَ
We know well how their talk grieveth thee, though in truth they deny not thee (Muhammad) but evil-doers flout the revelations of Allah.
Surah Al-An'aam(6:33)