Well, the Hijri date 22 Shawwal 1399 corresponds to the Gregorian date Thursday, 13 September 1979. This date lies in the tenth month of the Hijri year 1399 AH, which is Shawwal of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1399/10/22 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 13 September 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 22 Shawwal 1399 AH to its equivalent Gregorian date.
وَجَعَلْنَٰهُمْ أَئِمَّةًۭ يَدْعُونَ إِلَى ٱلنَّارِ ۖ وَيَوْمَ ٱلْقِيَٰمَةِ لَا يُنصَرُونَ
And We made them patterns that invite unto the Fire, and on the Day of Resurrection they will not be helped.
Surah Al-Qasas(28:41)
Sahih al-Bukhari
Medicine
Chapter: The taking of poison and treating with it
Narrated Sa`d:
I heard Allah's Messenger (ﷺ) saying, "Whoever takes seven 'Ajwa dates in the morning will not be effected by magic or poison on that day."
Sahih al-Bukhari 5779