Well, the Hijri date 13 Jumada Al Oula 1391 corresponds to the Gregorian date Monday, 5 July 1971. This date lies in the fifth month of the Hijri year 1391 AH, which is Jumada Al-Awwal of 1391 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1391/05/13 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 5 July 1971 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Jumada Al Oula 1391 AH to its equivalent Gregorian date.
لَهُمْ فِيهَا زَفِيرٌۭ وَهُمْ فِيهَا لَا يَسْمَعُونَ
Therein wailing is their portion, and therein they hear not.
Surah Al-Anbiyaa(21:100)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Narrated Sa`id bin Jubair:
I asked Ibn `Abbas about Surat Al-Tauba, and he said, "Surat Al-Tauba? It is exposure (of all the evils of the infidels and the hypocrites). And it continued revealing (that the oft-repeated expression): '...and of them ...and of them.' till they started thinking that none would be left unmentioned therein." I said, "What about) Surat Al-Anfal?" He replied, "Surat Al-Anfal was revealed in connection with the Badr Battle." I said, "(What about) Surat Al-Hashr?" He replied, "It was revealed in connection with Bani an-Nadir."
Sahih al-Bukhari 4882
