Well, the Hijri date 21 Shaban 1399 corresponds to the Gregorian date Sunday, 15 July 1979. This date lies in the eighth month of the Hijri year 1399 AH, which is Shaban of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1399/08/21 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 15 July 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shaban 1399 AH to its equivalent Gregorian date.
وَٱلَّذِينَ فِىٓ أَمْوَٰلِهِمْ حَقٌّۭ مَّعْلُومٌۭ
And in whose wealth there is a right acknowledged
Surah Al-Ma'aarij(70:24)
Sahih al-Bukhari
To make the Heart Tender (Ar-Riqaq)
Chapter: "Think they not that they will be resurrected on a Great Day"
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "The people will sweat so profusely on the Day of Resurrection that their sweat will sink seventy cubits deep into the earth, and it will rise up till it reaches the people's mouths and ears."
Sahih al-Bukhari 6532