Well, the Hijri date 18 Dhul Hijjah 1181 corresponds to the Gregorian date Thursday, 5 May 1768. This date lies in the twelfth month of the Hijri year 1181 AH, which is Dhu Al-Hijjah of 1181 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1181/12/18 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 5 May 1768 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Hijjah 1181 AH to its equivalent Gregorian date.
ثُمَّ رُدُّوٓا۟ إِلَى ٱللَّهِ مَوْلَىٰهُمُ ٱلْحَقِّ ۚ أَلَا لَهُ ٱلْحُكْمُ وَهُوَ أَسْرَعُ ٱلْحَٰسِبِينَ
Then are they restored unto Allah, their Lord, the Just. Surely His is the judgment. And He is the most swift of reckoners.
Surah Al-An'aam(6:62)