Well, the Hijri date 15 Rabi Al Thani 1393 corresponds to the Gregorian date Thursday, 17 May 1973. This date lies in the fourth month of the Hijri year 1393 AH, which is Rabi Al-Thani of 1393 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1393/04/15 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 17 May 1973 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1393 AH to its equivalent Gregorian date.
وَعَلَى ٱلَّذِينَ هَادُوا۟ حَرَّمْنَا مَا قَصَصْنَا عَلَيْكَ مِن قَبْلُ ۖ وَمَا ظَلَمْنَٰهُمْ وَلَٰكِن كَانُوٓا۟ أَنفُسَهُمْ يَظْلِمُونَ
And unto those who are Jews We have forbidden that which We have already related unto thee. And We wronged them not, but they were wont to wrong themselves.
Surah An-Nahl(16:118)