Well, the Hijri date 17 Dhul Qidah 1399 corresponds to the Gregorian date Monday, 8 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 Monday without any doubt. The Arabic date 1399/11/17 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 8 October 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Dhul Qidah 1399 AH to its equivalent Gregorian date.
هَٰذَا بَلَٰغٌۭ لِّلنَّاسِ وَلِيُنذَرُوا۟ بِهِۦ وَلِيَعْلَمُوٓا۟ أَنَّمَا هُوَ إِلَٰهٌۭ وَٰحِدٌۭ وَلِيَذَّكَّرَ أُو۟لُوا۟ ٱلْأَلْبَٰبِ
This is a clear message for mankind in order that they may be warned thereby, and that they may know that He is only One Allah, and that men of understanding may take heed.
Surah Ibrahim(14:52)
Sahih al-Bukhari
One-fifth of Booty to the Cause of Allah (Khumus)
Chapter: The armour of the Prophet saws
Narrated Anas:
That when Abu Bakr became the Caliph, he sent him to Bahrain and wrote this letter for him, and stamped it with the Ring of the Prophet. Three lines were engraved on the Ring, (the word) 'Muhammad' was in a line, 'Apostle' was in another line, and 'Allah' in a third.
Sahih al-Bukhari 3106