Well, the Hijri date 13 Shawwal 1171 corresponds to the Gregorian date Monday, 19 June 1758. This date lies in the tenth month of the Hijri year 1171 AH, which is Shawwal of 1171 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1171/10/13 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 19 June 1758 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Shawwal 1171 AH to its equivalent Gregorian date.
وَهُوَ ٱلَّذِى سَخَّرَ ٱلْبَحْرَ لِتَأْكُلُوا۟ مِنْهُ لَحْمًۭا طَرِيًّۭا وَتَسْتَخْرِجُوا۟ مِنْهُ حِلْيَةًۭ تَلْبَسُونَهَا وَتَرَى ٱلْفُلْكَ مَوَاخِرَ فِيهِ وَلِتَبْتَغُوا۟ مِن فَضْلِهِۦ وَلَعَلَّكُمْ تَشْكُرُونَ
And He it is Who hath constrained the sea to be of service that ye eat fresh meat from thence, and bring forth from thence ornaments which ye wear. And thou seest the ships ploughing it that ye (mankind) may seek of His bounty and that haply ye may give thanks.
Surah An-Nahl(16:14)