Well, the Hijri date 20 Ramadan 1152 corresponds to the Gregorian date Sunday, 20 December 1739. This date lies in the ninth month of the Hijri year 1152 AH, which is Ramadan of 1152 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1152/09/20 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 20 December 1739 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Ramadan 1152 AH to its equivalent Gregorian date.
وَمَا كَانَ ٱسْتِغْفَارُ إِبْرَٰهِيمَ لِأَبِيهِ إِلَّا عَن مَّوْعِدَةٍۢ وَعَدَهَآ إِيَّاهُ فَلَمَّا تَبَيَّنَ لَهُۥٓ أَنَّهُۥ عَدُوٌّۭ لِّلَّهِ تَبَرَّأَ مِنْهُ ۚ إِنَّ إِبْرَٰهِيمَ لَأَوَّٰهٌ حَلِيمٌۭ
The prayer of Abraham for the forgiveness of his father was only because of a promise he had promised him, but when it had become clear unto him that he (his father) was an enemy to Allah he (Abraham) disowned him. Lo! Abraham was soft of heart, long-suffering.
Surah At-Tawba(9:114)