Well, the Hijri date 28 Shawwal 1212 corresponds to the Gregorian date Saturday, 14 April 1798. This date lies in the tenth month of the Hijri year 1212 AH, which is Shawwal of 1212 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1212/10/28 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 April 1798 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Shawwal 1212 AH to its equivalent Gregorian date.
وَقَالُوا۟ لَوْ شَآءَ ٱلرَّحْمَٰنُ مَا عَبَدْنَٰهُم ۗ مَّا لَهُم بِذَٰلِكَ مِنْ عِلْمٍ ۖ إِنْ هُمْ إِلَّا يَخْرُصُونَ
And they say: If the Beneficent One had (so) willed, we should not have worshipped them. They have no knowledge whatsoever of that. They do but guess.
Surah Az-Zukhruf(43:20)
