Well, the Hijri date 18 Rabi Al Thani 1181 corresponds to the Gregorian date Saturday, 12 September 1767. This date lies in the fourth month of the Hijri year 1181 AH, which is Rabi Al-Thani of 1181 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1181/04/18 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 12 September 1767 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1181 AH to its equivalent Gregorian date.
وَلَقَدْ أَرْسَلْنَآ إِلَىٰٓ أُمَمٍۢ مِّن قَبْلِكَ فَأَخَذْنَٰهُم بِٱلْبَأْسَآءِ وَٱلضَّرَّآءِ لَعَلَّهُمْ يَتَضَرَّعُونَ
We have sent already unto peoples that were before thee, and We visited them with tribulation and adversity, in order that they might grow humble.
Surah Al-An'aam(6:42)