Well, the Hijri date 11 Rajab 1391 corresponds to the Gregorian date Tuesday, 31 August 1971. This date lies in the seventh month of the Hijri year 1391 AH, which is Rajab of 1391 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1391/07/11 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 31 August 1971 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Rajab 1391 AH to its equivalent Gregorian date.
قَالَتْ لَهُمْ رُسُلُهُمْ إِن نَّحْنُ إِلَّا بَشَرٌۭ مِّثْلُكُمْ وَلَٰكِنَّ ٱللَّهَ يَمُنُّ عَلَىٰ مَن يَشَآءُ مِنْ عِبَادِهِۦ ۖ وَمَا كَانَ لَنَآ أَن نَّأْتِيَكُم بِسُلْطَٰنٍ إِلَّا بِإِذْنِ ٱللَّهِ ۚ وَعَلَى ٱللَّهِ فَلْيَتَوَكَّلِ ٱلْمُؤْمِنُونَ
Their messengers said unto them: We are but mortals like you, but Allah giveth grace unto whom He will of His slaves. It is not ours to bring you a warrant unless by the permission of Allah. In Allah let believers put their trust!
Surah Ibrahim(14:11)