Well, the Hijri date 20 Shawwal 1182 corresponds to the Gregorian date Sunday, 26 February 1769. This date lies in the tenth month of the Hijri year 1182 AH, which is Shawwal of 1182 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1182/10/20 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 26 February 1769 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Shawwal 1182 AH to its equivalent Gregorian date.
أَمْ لَمْ يَعْرِفُوا۟ رَسُولَهُمْ فَهُمْ لَهُۥ مُنكِرُونَ
Or know they not their messenger, and so reject him?
Surah Al-Muminoon(23:69)