Well, the Hijri date 16 Rabi Al Thani 1399 corresponds to the Gregorian date Wednesday, 14 March 1979. This date lies in the fourth month of the Hijri year 1399 AH, which is Rabi Al-Thani of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1399/04/16 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 14 March 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Rabi Al Thani 1399 AH to its equivalent Gregorian date.
قُلْ هَلْ نُنَبِّئُكُم بِٱلْأَخْسَرِينَ أَعْمَٰلًا
Say: Shall We inform you who will be the greatest losers by their works?
Surah Al-Kahf(18:103)
Sahih al-Bukhari
Prophets
Chapter: The Statement of Allah Taa'la: "And indeed We bestowed upon Luqman Al-Hikmah..."
Narrated `Abdullah:
When the Verse:-- 'Those who believe and mix not their belief with wrong." was revealed, the companions of the Prophet (ﷺ) said, "Who amongst us has not mixed his belief with wrong?" Then Allah revealed: "Join none in worship with Allah, Verily joining others in worship with Allah is a great wrong indeed."
Sahih al-Bukhari 3428