Well, the Hijri date 11 Rabi Al Awwal 1159 corresponds to the Gregorian date Saturday, 2 April 1746. This date lies in the third month of the Hijri year 1159 AH, which is Rabi Al-Awwal of 1159 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1159/03/11 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 2 April 1746 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Rabi Al Awwal 1159 AH to its equivalent Gregorian date.
أَفَمَن كَانَ عَلَىٰ بَيِّنَةٍۢ مِّن رَّبِّهِۦ وَيَتْلُوهُ شَاهِدٌۭ مِّنْهُ وَمِن قَبْلِهِۦ كِتَٰبُ مُوسَىٰٓ إِمَامًۭا وَرَحْمَةً ۚ أُو۟لَٰٓئِكَ يُؤْمِنُونَ بِهِۦ ۚ وَمَن يَكْفُرْ بِهِۦ مِنَ ٱلْأَحْزَابِ فَٱلنَّارُ مَوْعِدُهُۥ ۚ فَلَا تَكُ فِى مِرْيَةٍۢ مِّنْهُ ۚ إِنَّهُ ٱلْحَقُّ مِن رَّبِّكَ وَلَٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يُؤْمِنُونَ
Is he (to be counted equal with them) who relieth on a clear proof from his Lord, and a witness from Him reciteth it, and before it was the Book of Moses, an example and a mercy? Such believe therein, and whoso disbelieveth therein of the clans, the Fire is his appointed place. So be not thou in doubt concerning it. Lo! it is the Truth from thy Lord; but most of mankind believe not.
Surah Hud(11:17)