Well, the Hijri date 28 Jumada Al Oula 1191 corresponds to the Gregorian date Thursday, 3 July 1777. This date lies in the fifth month of the Hijri year 1191 AH, which is Jumada Al-Awwal of 1191 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1191/05/28 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 3 July 1777 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Jumada Al Oula 1191 AH to its equivalent Gregorian date.
وَإِنِّى مُرْسِلَةٌ إِلَيْهِم بِهَدِيَّةٍۢ فَنَاظِرَةٌۢ بِمَ يَرْجِعُ ٱلْمُرْسَلُونَ
But lo! I am going to send a present unto them, and to see with what (answer) the messengers return.
Surah An-Naml(27:35)