Well, the Hijri date 27 Rajab 1188 corresponds to the Gregorian date Sunday, 2 October 1774. This date lies in the seventh month of the Hijri year 1188 AH, which is Rajab of 1188 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1188/07/27 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 2 October 1774 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rajab 1188 AH to its equivalent Gregorian date.
إِنَّ ٱلَّذِينَ كَفَرُوا۟ لَن تُغْنِىَ عَنْهُمْ أَمْوَٰلُهُمْ وَلَآ أَوْلَٰدُهُم مِّنَ ٱللَّهِ شَيْـًۭٔا ۖ وَأُو۟لَٰٓئِكَ هُمْ وَقُودُ ٱلنَّارِ
(On that Day) neither the riches nor the progeny of those who disbelieve will aught avail them with Allah. They will be fuel for Fire.
Surah Aal-i-Imraan(3:10)