Well, the Hijri date 6 Dhul Qidah 1390 corresponds to the Gregorian date Sunday, 3 January 1971. This date lies in the eleventh month of the Hijri year 1390 AH, which is Dhu Al-Qidah of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1390/11/06 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 3 January 1971 to its equivalent Arabic date.
The following is the conversion of the Arabic date 6 Dhul Qidah 1390 AH to its equivalent Gregorian date.
ذَٰلِكَ بِأَنَّ ٱللَّهَ يُولِجُ ٱلَّيْلَ فِى ٱلنَّهَارِ وَيُولِجُ ٱلنَّهَارَ فِى ٱلَّيْلِ وَأَنَّ ٱللَّهَ سَمِيعٌۢ بَصِيرٌۭ
That is because Allah maketh the night to pass into the day and maketh the day to pass into the night, and because Allah is Hearer, Seer.
Surah Al-Hajj(22:61)