Well, the Hijri date 16 Rabi Al Thani 1383 corresponds to the Gregorian date Wednesday, 4 September 1963. This date lies in the fourth month of the Hijri year 1383 AH, which is Rabi Al-Thani of 1383 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1383/04/16 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 4 September 1963 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Rabi Al Thani 1383 AH to its equivalent Gregorian date.
وَٱلَّذِينَ كَفَرُوا۟ بِـَٔايَٰتِ ٱللَّهِ وَلِقَآئِهِۦٓ أُو۟لَٰٓئِكَ يَئِسُوا۟ مِن رَّحْمَتِى وَأُو۟لَٰٓئِكَ لَهُمْ عَذَابٌ أَلِيمٌۭ
Those who disbelieve in the revelations of Allah and in (their) Meeting with Him, such have no hope of My mercy. For such there is a painful doom.
Surah Al-Ankaboot(29:23)