Well, the Hijri date 5 Dhul Qidah 1399 corresponds to the Gregorian date Wednesday, 26 September 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 Wednesday without any doubt. The Arabic date 1399/11/05 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 26 September 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 5 Dhul Qidah 1399 AH to its equivalent Gregorian date.
۞ قُلْ إِنَّمَآ أَعِظُكُم بِوَٰحِدَةٍ ۖ أَن تَقُومُوا۟ لِلَّهِ مَثْنَىٰ وَفُرَٰدَىٰ ثُمَّ تَتَفَكَّرُوا۟ ۚ مَا بِصَاحِبِكُم مِّن جِنَّةٍ ۚ إِنْ هُوَ إِلَّا نَذِيرٌۭ لَّكُم بَيْنَ يَدَىْ عَذَابٍۢ شَدِيدٍۢ
Say (unto them, O Muhammad): I exhort you unto one thing only: that ye awake, for Allah's sake, by twos and singly, and then reflect: There is no madness in your comrade. He is naught else than a warner unto you in face of a terrific doom.
Surah Saba(34:46)
Sahih al-Bukhari
Fasting
Chapter: The two months of Eid do not decrease
Narrated Abu Bakra:
The Prophet (ﷺ) said, "The two months of `Id i.e. Ramadan and Dhul-Hijja, do not decrease (in superiority).
Sahih al-Bukhari 1912