Well, the Hijri date 28 Shaban 1403 corresponds to the Gregorian date Thursday, 9 June 1983. This date lies in the eighth month of the Hijri year 1403 AH, which is Shaban of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1403/08/28 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 9 June 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Shaban 1403 AH to its equivalent Gregorian date.
وَيَوْمَ نُسَيِّرُ ٱلْجِبَالَ وَتَرَى ٱلْأَرْضَ بَارِزَةًۭ وَحَشَرْنَٰهُمْ فَلَمْ نُغَادِرْ مِنْهُمْ أَحَدًۭا
And (bethink you of) the Day when we remove the hills and ye see the earth emerging, and We gather them together so as to leave not one of them behind.
Surah Al-Kahf(18:47)