Well, the Hijri date 13 Shawwal 1235 corresponds to the Gregorian date Sunday, 23 July 1820. This date lies in the tenth month of the Hijri year 1235 AH, which is Shawwal of 1235 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1235/10/13 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 23 July 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Shawwal 1235 AH to its equivalent Gregorian date.
رَبَّنَآ إِنَّكَ مَن تُدْخِلِ ٱلنَّارَ فَقَدْ أَخْزَيْتَهُۥ ۖ وَمَا لِلظَّٰلِمِينَ مِنْ أَنصَارٍۢ
Our Lord! Whom Thou causest to enter the Fire: him indeed Thou hast confounded. For evil-doers there will be no helpers.
Surah Aal-i-Imraan(3:192)