Well, the Hijri date 18 Rabi Al Thani 1383 corresponds to the Gregorian date Friday, 6 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 Friday without any doubt. The Arabic date 1383/04/18 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 6 September 1963 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1383 AH to its equivalent Gregorian date.
وَٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّٰلِحَٰتِ لَنُدْخِلَنَّهُمْ فِى ٱلصَّٰلِحِينَ
And as for those who believe and do good works, We verily shall make them enter in among the righteous.
Surah Al-Ankaboot(29:9)