Well, the Hijri date 28 Rajab 1189 corresponds to the Gregorian date Saturday, 23 September 1775. This date lies in the seventh month of the Hijri year 1189 AH, which is Rajab of 1189 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1189/07/28 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 23 September 1775 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Rajab 1189 AH to its equivalent Gregorian date.
وَلَقَدْ ذَرَأْنَا لِجَهَنَّمَ كَثِيرًۭا مِّنَ ٱلْجِنِّ وَٱلْإِنسِ ۖ لَهُمْ قُلُوبٌۭ لَّا يَفْقَهُونَ بِهَا وَلَهُمْ أَعْيُنٌۭ لَّا يُبْصِرُونَ بِهَا وَلَهُمْ ءَاذَانٌۭ لَّا يَسْمَعُونَ بِهَآ ۚ أُو۟لَٰٓئِكَ كَٱلْأَنْعَٰمِ بَلْ هُمْ أَضَلُّ ۚ أُو۟لَٰٓئِكَ هُمُ ٱلْغَٰفِلُونَ
Already have We urged unto hell many of the jinn and humankind, having hearts wherewith they understand not, and having eyes wherewith they see not, and having ears wherewith they hear not. These are as the cattle - nay, but they are worse! These are the neglectful.
Surah Al-A'raaf(7:179)