Well, the Hijri date 16 Rabi Al Awwal 1399 corresponds to the Gregorian date Tuesday, 13 February 1979. This date lies in the third month of the Hijri year 1399 AH, which is Rabi Al-Awwal of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1399/03/16 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 13 February 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Rabi Al Awwal 1399 AH to its equivalent Gregorian date.
فَلَا تُعْجِبْكَ أَمْوَٰلُهُمْ وَلَآ أَوْلَٰدُهُمْ ۚ إِنَّمَا يُرِيدُ ٱللَّهُ لِيُعَذِّبَهُم بِهَا فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا وَتَزْهَقَ أَنفُسُهُمْ وَهُمْ كَٰفِرُونَ
So let not their riches nor their children please thee (O Muhammad). Allah thereby intendeth but to punish them in the life of the world and that their souls shall pass away while they are disbelievers.
Surah At-Tawba(9:55)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"...And sever your ties of kinship." (V.47:22)
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Allah created His creation, and when He had finished it, the womb, got up and caught hold of Allah whereupon Allah said, "What is the matter?' On that, it said, 'I seek refuge with you from those who sever the ties of Kith and kin.' On that Allah said, 'Will you be satisfied if I bestow My favors on him who keeps your ties, and withhold My favors from him who severs your ties?' On that it said, 'Yes, O my Lord!' Then Allah said, 'That is for you.' " Abu Huraira added: If you wish, you can recite: "Would you then if you were given the authority. do mischief in the land and sever your ties of kinship. (47. 22)
Sahih al-Bukhari 4830