Well, the Hijri date 10 Jumada Al Akhira 1399 corresponds to the Gregorian date Sunday, 6 May 1979. This date lies in the sixth month of the Hijri year 1399 AH, which is Jumada Al-Thani of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1399/06/10 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 6 May 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Jumada Al Akhira 1399 AH to its equivalent Gregorian date.
وَجَعَلُوا۟ لِلَّهِ مِمَّا ذَرَأَ مِنَ ٱلْحَرْثِ وَٱلْأَنْعَٰمِ نَصِيبًۭا فَقَالُوا۟ هَٰذَا لِلَّهِ بِزَعْمِهِمْ وَهَٰذَا لِشُرَكَآئِنَا ۖ فَمَا كَانَ لِشُرَكَآئِهِمْ فَلَا يَصِلُ إِلَى ٱللَّهِ ۖ وَمَا كَانَ لِلَّهِ فَهُوَ يَصِلُ إِلَىٰ شُرَكَآئِهِمْ ۗ سَآءَ مَا يَحْكُمُونَ
They assign unto Allah, of the crops and cattle which He created, a portion, and they say: "This is Allah's" - in their make-believe - "and this is for (His) partners in regard to us." Thus that which (they assign) unto His partners in them reacheth not Allah and that which (they assign) unto Allah goeth to their (so-called) partners. Evil is their ordinance.
Surah Al-An'aam(6:136)