Well, the Hijri date 13 Shawwal 1242 corresponds to the Gregorian date Wednesday, 9 May 1827. This date lies in the tenth month of the Hijri year 1242 AH, which is Shawwal of 1242 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1242/10/13 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 9 May 1827 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Shawwal 1242 AH to its equivalent Gregorian date.
وَمِن قَبْلِهِۦ كِتَٰبُ مُوسَىٰٓ إِمَامًۭا وَرَحْمَةًۭ ۚ وَهَٰذَا كِتَٰبٌۭ مُّصَدِّقٌۭ لِّسَانًا عَرَبِيًّۭا لِّيُنذِرَ ٱلَّذِينَ ظَلَمُوا۟ وَبُشْرَىٰ لِلْمُحْسِنِينَ
When before it there was the Scripture of Moses, an example and a mercy; and this is a confirming Scripture in the Arabic language, that it may warn those who do wrong and bring good tidings for the righteous.
Surah Al-Ahqaf(46:12)