Well, the Hijri date 25 Ramadan 1189 corresponds to the Gregorian date Saturday, 18 November 1775. This date lies in the ninth month of the Hijri year 1189 AH, which is Ramadan of 1189 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1189/09/25 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 18 November 1775 to its equivalent Arabic date.
The following is the conversion of the Arabic date 25 Ramadan 1189 AH to its equivalent Gregorian date.
أَمْ لَكُمْ أَيْمَٰنٌ عَلَيْنَا بَٰلِغَةٌ إِلَىٰ يَوْمِ ٱلْقِيَٰمَةِ ۙ إِنَّ لَكُمْ لَمَا تَحْكُمُونَ
Or have ye a covenant on oath from Us that reacheth to the Day of Judgment, that yours shall be all that ye ordain?
Surah Al-Qalam(68:39)