Well, the Hijri date 21 Rabi Al Thani 1379 corresponds to the Gregorian date Friday, 23 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 Friday without any doubt. The Arabic date 1379/04/21 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 23 October 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1379 AH to its equivalent Gregorian date.
قُل لَّا يَعْلَمُ مَن فِى ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ٱلْغَيْبَ إِلَّا ٱللَّهُ ۚ وَمَا يَشْعُرُونَ أَيَّانَ يُبْعَثُونَ
Say (O Muhammad): None in the heavens and the earth knoweth the Unseen save Allah; and they know not when they will be raised (again).
Surah An-Naml(27:65)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"And whether you disclose what is in your ownselves or conceal it..." (V.2:284)
Narrated Ibn `Umar:
This Verse:--"Whether you show what is in your minds or conceal it.." (2.284) was abrogated.
Sahih al-Bukhari 4545