Well, the Hijri date 20 Muharram 1186 corresponds to the Gregorian date Thursday, 23 April 1772. This date lies in the first month of the Hijri year 1186 AH, which is Muharram of 1186 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1186/01/20 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 23 April 1772 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Muharram 1186 AH to its equivalent Gregorian date.
۞ ذَٰلِكَ وَمَنْ عَاقَبَ بِمِثْلِ مَا عُوقِبَ بِهِۦ ثُمَّ بُغِىَ عَلَيْهِ لَيَنصُرَنَّهُ ٱللَّهُ ۗ إِنَّ ٱللَّهَ لَعَفُوٌّ غَفُورٌۭ
That (is so). And whoso hath retaliated with the like of that which he was made to suffer and then hath (again) been wronged, Allah will succour him. Lo! Allah verily is Mild, Forgiving.
Surah Al-Hajj(22:60)