Well, the Hijri date 13 Rabi Al Thani 1379 corresponds to the Gregorian date Thursday, 15 October 1959. This date lies in the fourth month of the Hijri year 1379 AH, which is Rabi Al-Thani of 1379 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1379/04/13 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 15 October 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Rabi Al Thani 1379 AH to its equivalent Gregorian date.
أَوَلَمْ يَعْلَمُوٓا۟ أَنَّ ٱللَّهَ يَبْسُطُ ٱلرِّزْقَ لِمَن يَشَآءُ وَيَقْدِرُ ۚ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يُؤْمِنُونَ
Know they not that Allah enlargeth providence for whom He will, and straiteneth it (for whom He will). Lo! herein verily are portents for people who believe.
Surah Az-Zumar(39:52)
Sahih al-Bukhari
Beginning of Creation
Chapter: The characteristics of Paradise, and the fact that it has already been created
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "Allah said, "I have prepared for My Pious slaves things which have never been seen by an eye, or heard by an ear, or imagined by a human being." If you wish, you can recite this Verse from the Holy Qur'an:--"No soul knows what is kept hidden for them, of joy as a reward for what they used to do." (32.17)
Sahih al-Bukhari 3244