Well, the Hijri date 27 Shawwal 1212 corresponds to the Gregorian date Friday, 13 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 Friday without any doubt. The Arabic date 1212/10/27 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 13 April 1798 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Shawwal 1212 AH to its equivalent Gregorian date.
وَمَا كُنتَ تَتْلُوا۟ مِن قَبْلِهِۦ مِن كِتَٰبٍۢ وَلَا تَخُطُّهُۥ بِيَمِينِكَ ۖ إِذًۭا لَّٱرْتَابَ ٱلْمُبْطِلُونَ
And thou (O Muhammad) wast not a reader of any scripture before it, nor didst thou write it with thy right hand, for then might those have doubted, who follow falsehood.
Surah Al-Ankaboot(29:48)