Well, the Hijri date 15 Ramadan 1172 corresponds to the Gregorian date Friday, 11 May 1759. This date lies in the ninth month of the Hijri year 1172 AH, which is Ramadan of 1172 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1172/09/15 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 May 1759 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Ramadan 1172 AH to its equivalent Gregorian date.
ثُمَّ بَعَثْنَا مِنۢ بَعْدِهِم مُّوسَىٰ وَهَٰرُونَ إِلَىٰ فِرْعَوْنَ وَمَلَإِي۟هِۦ بِـَٔايَٰتِنَا فَٱسْتَكْبَرُوا۟ وَكَانُوا۟ قَوْمًۭا مُّجْرِمِينَ
Then, after them, We sent Moses and Aaron unto Pharaoh and his chiefs with Our revelations, but they were arrogant and were a guilty folk.
Surah Yunus(10:75)