Well, the Hijri date 13 Dhul Qidah 1399 corresponds to the Gregorian date Thursday, 4 October 1979. This date lies in the eleventh month of the Hijri year 1399 AH, which is Dhu Al-Qidah of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1399/11/13 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 4 October 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Dhul Qidah 1399 AH to its equivalent Gregorian date.
وَكَانُوا۟ يَقُولُونَ أَئِذَا مِتْنَا وَكُنَّا تُرَابًۭا وَعِظَٰمًا أَءِنَّا لَمَبْعُوثُونَ
And they used to say: When we are dead and have become dust and bones, shall we then, forsooth, be raised again,
Surah Al-Waaqia(56:47)
Sahih al-Bukhari
Oaths and Vows
Chapter: The intention in taking oaths
Narrated `Umar bin Al-Khattab:
I heard Allah's Messenger (ﷺ) saying, "The (reward of) deeds, depend upon the intentions and every person will get the reward according to what he has intended. So whoever emigrated for the sake of Allah and His Apostle, then his emigration will be considered to be for Allah and His Apostle, and whoever emigrated for the sake of worldly gain or for a woman to marry, then his emigration will be considered to be for what he emigrated for."
Sahih al-Bukhari 6689
