Well, the Hijri date 18 Shaban 1393 corresponds to the Gregorian date Saturday, 15 September 1973. This date lies in the eighth month of the Hijri year 1393 AH, which is Shaban of 1393 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1393/08/18 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 15 September 1973 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Shaban 1393 AH to its equivalent Gregorian date.
وَأَمَّا ٱلْجِدَارُ فَكَانَ لِغُلَٰمَيْنِ يَتِيمَيْنِ فِى ٱلْمَدِينَةِ وَكَانَ تَحْتَهُۥ كَنزٌۭ لَّهُمَا وَكَانَ أَبُوهُمَا صَٰلِحًۭا فَأَرَادَ رَبُّكَ أَن يَبْلُغَآ أَشُدَّهُمَا وَيَسْتَخْرِجَا كَنزَهُمَا رَحْمَةًۭ مِّن رَّبِّكَ ۚ وَمَا فَعَلْتُهُۥ عَنْ أَمْرِى ۚ ذَٰلِكَ تَأْوِيلُ مَا لَمْ تَسْطِع عَّلَيْهِ صَبْرًۭا
And as for the wall, it belonged to two orphan boys in the city, and there was beneath it a treasure belonging to them, and their father had been righteous, and thy Lord intended that they should come to their full strength and should bring forth their treasure as a mercy from their Lord; and I did it not upon my own command. Such is the interpretation of that wherewith thou couldst not bear.
Surah Al-Kahf(18:82)