Well, the Hijri date 13 Safar 1391 corresponds to the Gregorian date Thursday, 8 April 1971. This date lies in the second month of the Hijri year 1391 AH, which is Safar of 1391 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1391/02/13 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 8 April 1971 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Safar 1391 AH to its equivalent Gregorian date.
يَٰبَنِىٓ إِسْرَٰٓءِيلَ قَدْ أَنجَيْنَٰكُم مِّنْ عَدُوِّكُمْ وَوَٰعَدْنَٰكُمْ جَانِبَ ٱلطُّورِ ٱلْأَيْمَنَ وَنَزَّلْنَا عَلَيْكُمُ ٱلْمَنَّ وَٱلسَّلْوَىٰ
O Children of Israel! We delivered you from your enemy, and we made a covenant with you on the holy mountain's side, and sent down on you the manna and the quails,
Surah Taa-Haa(20:80)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The entrance of the Prophet (saws) from the upper part of Makkah
Narrated Hisham's father:
During the year of the Conquest (of Mecca), the Prophet (ﷺ) entered Mecca through its upper part through Kada.
Sahih al-Bukhari 4291