Well, the Hijri date 4 Rabi Al Awwal 1399 corresponds to the Gregorian date Thursday, 1 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 Thursday without any doubt. The Arabic date 1399/03/04 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 1 February 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Rabi Al Awwal 1399 AH to its equivalent Gregorian date.
وَتَرَىٰهُمْ يُعْرَضُونَ عَلَيْهَا خَٰشِعِينَ مِنَ ٱلذُّلِّ يَنظُرُونَ مِن طَرْفٍ خَفِىٍّۢ ۗ وَقَالَ ٱلَّذِينَ ءَامَنُوٓا۟ إِنَّ ٱلْخَٰسِرِينَ ٱلَّذِينَ خَسِرُوٓا۟ أَنفُسَهُمْ وَأَهْلِيهِمْ يَوْمَ ٱلْقِيَٰمَةِ ۗ أَلَآ إِنَّ ٱلظَّٰلِمِينَ فِى عَذَابٍۢ مُّقِيمٍۢ
And thou wilt see them exposed to (the Fire), made humble by disgrace, and looking with veiled eyes. And those who believe will say: Lo! the (eternal) losers are they who lose themselves and their housefolk on the Day of Resurrection. Lo! are not the wrong-doers in perpetual torment?
Surah Ash-Shura(42:45)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
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Narrated `Abdullah bin Dinar:
`Abdullah Bin `Umar wrote to `Abdul Malik bin Marwan, swearing allegiance to him: 'I swear allegiance to you in that I will listen and obey what is in accordance with the Laws of Allah and the Tradition of His Apostle as much as I can.'
Sahih al-Bukhari 7272