Well, the Hijri date 12 Rabi Al Thani 1390 corresponds to the Gregorian date Tuesday, 16 June 1970. This date lies in the fourth month of the Hijri year 1390 AH, which is Rabi Al-Thani of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1390/04/12 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 16 June 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Rabi Al Thani 1390 AH to its equivalent Gregorian date.
قُلْ أَنَدْعُوا۟ مِن دُونِ ٱللَّهِ مَا لَا يَنفَعُنَا وَلَا يَضُرُّنَا وَنُرَدُّ عَلَىٰٓ أَعْقَابِنَا بَعْدَ إِذْ هَدَىٰنَا ٱللَّهُ كَٱلَّذِى ٱسْتَهْوَتْهُ ٱلشَّيَٰطِينُ فِى ٱلْأَرْضِ حَيْرَانَ لَهُۥٓ أَصْحَٰبٌۭ يَدْعُونَهُۥٓ إِلَى ٱلْهُدَى ٱئْتِنَا ۗ قُلْ إِنَّ هُدَى ٱللَّهِ هُوَ ٱلْهُدَىٰ ۖ وَأُمِرْنَا لِنُسْلِمَ لِرَبِّ ٱلْعَٰلَمِينَ
Say: Shall we cry, instead of unto Allah, unto that which neither profiteth us nor hurteth us, and shall we turn back after Allah hath guided us, like one bewildered whom the devils have infatuated in the earth, who hath companions who invite him to the guidance (saying): Come unto us? Say: Lo! the guidance of Allah is Guidance, and we are ordered to surrender to the Lord of the Worlds,
Surah Al-An'aam(6:71)
Sahih al-Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Chapter: The Kunya of the Prophet (saws)
Narrated Anas:
While the Prophet (ﷺ) was in the market, a man called (somebody), "O Abu-l-Qasim!' The Prophet (ﷺ) turned to him and said "Name yourselves after me but do not call yourselves by my Kuniya."
Sahih al-Bukhari 3537