Well, the Hijri date 14 Rabi Al Awwal 1399 corresponds to the Gregorian date Sunday, 11 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 Sunday without any doubt. The Arabic date 1399/03/14 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 11 February 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 14 Rabi Al Awwal 1399 AH to its equivalent Gregorian date.
وَلَا يَحْسَبَنَّ ٱلَّذِينَ كَفَرُوا۟ سَبَقُوٓا۟ ۚ إِنَّهُمْ لَا يُعْجِزُونَ
And let not those who disbelieve suppose that they can outstrip (Allah's Purpose). Lo! they cannot escape.
Surah Al-Anfaal(8:59)
Sahih al-Bukhari
Prayer at Night (Tahajjud)
Chapter: To offer Salat-ud-Duha when not traveling
Narrated Abu Huraira:
My friend (the Prophet) advised me to do three things and I shall not leave them till I die, these are: To fast three days every month, to offer the Duha prayer, and to offer witr before sleeping.
Sahih al-Bukhari 1178