Well, the Hijri date 15 Rabi Al Thani 1185 corresponds to the Gregorian date Saturday, 27 July 1771. This date lies in the fourth month of the Hijri year 1185 AH, which is Rabi Al-Thani of 1185 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1185/04/15 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 27 July 1771 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1185 AH to its equivalent Gregorian date.
فَرِحِينَ بِمَآ ءَاتَىٰهُمُ ٱللَّهُ مِن فَضْلِهِۦ وَيَسْتَبْشِرُونَ بِٱلَّذِينَ لَمْ يَلْحَقُوا۟ بِهِم مِّنْ خَلْفِهِمْ أَلَّا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ
Jubilant (are they) because of that which Allah hath bestowed upon them of His bounty, rejoicing for the sake of those who have not joined them but are left behind: That there shall no fear come upon them neither shall they grieve.
Surah Aal-i-Imraan(3:170)