Well, the Hijri date 20 Muharram 1198 corresponds to the Gregorian date Sunday, 14 December 1783. This date lies in the first month of the Hijri year 1198 AH, which is Muharram of 1198 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1198/01/20 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 14 December 1783 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Muharram 1198 AH to its equivalent Gregorian date.
فَمَا مِنكُم مِّنْ أَحَدٍ عَنْهُ حَٰجِزِينَ
And not one of you could have held Us off from him.
Surah Al-Haaqqa(69:47)