Well, the Hijri date 16 Rajab 1191 corresponds to the Gregorian date Tuesday, 19 August 1777. This date lies in the seventh month of the Hijri year 1191 AH, which is Rajab of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1191/07/16 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 19 August 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Rajab 1191 AH to its equivalent Gregorian date.
هُوَ ٱلَّذِى يُرِيكُمْ ءَايَٰتِهِۦ وَيُنَزِّلُ لَكُم مِّنَ ٱلسَّمَآءِ رِزْقًۭا ۚ وَمَا يَتَذَكَّرُ إِلَّا مَن يُنِيبُ
He it is Who showeth you His portents, and sendeth down for you provision from the sky. None payeth heed save him who turneth (unto Him) repentant.
Surah Ghafir(40:13)