Well, the Hijri date 21 Ramadan 1391 corresponds to the Gregorian date Tuesday, 9 November 1971. This date lies in the ninth month of the Hijri year 1391 AH, which is Ramadan of 1391 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1391/09/21 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 9 November 1971 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Ramadan 1391 AH to its equivalent Gregorian date.
لِيَكْفُرُوا۟ بِمَآ ءَاتَيْنَٰهُمْ ۚ فَتَمَتَّعُوا۟ ۖ فَسَوْفَ تَعْلَمُونَ
So as to deny that which We have given them. Then enjoy life (while ye may), for ye will come to know.
Surah An-Nahl(16:55)
Sahih al-Bukhari
Blood Money (Ad-Diyat)
Chapter: The foetus of a woman
Narrated Hisham's father from Al-Mughira bin Shu'ba:
'Umar consulted the companions about the case of a woman's abortion (caused by somebody else). Al-Mughira said: The Prophet (ﷺ) gave the verdict that a male or female slave should be given (as a Diya). Then Muhammad bin Maslama testified that he had witnessed the Prophet (ﷺ) giving such a verdict.
Sahih al-Bukhari 6905, 6906