Well, the Hijri date 14 Rabi Al Thani 1191 corresponds to the Gregorian date Wednesday, 21 May 1777. This date lies in the fourth month of the Hijri year 1191 AH, which is Rabi Al-Thani of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1191/04/14 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 21 May 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 14 Rabi Al Thani 1191 AH to its equivalent Gregorian date.
قُلْ إِن تُخْفُوا۟ مَا فِى صُدُورِكُمْ أَوْ تُبْدُوهُ يَعْلَمْهُ ٱللَّهُ ۗ وَيَعْلَمُ مَا فِى ٱلسَّمَٰوَٰتِ وَمَا فِى ٱلْأَرْضِ ۗ وَٱللَّهُ عَلَىٰ كُلِّ شَىْءٍۢ قَدِيرٌۭ
Say, (O Muhammad): Whether ye hide that which is in your breasts or reveal it, Allah knoweth it. He knoweth that which is in the heavens and that which is in the earth, and Allah is Able to do all things.
Surah Aal-i-Imraan(3:29)