Well, the Hijri date 15 Shawwal 1241 corresponds to the Gregorian date Monday, 22 May 1826. This date lies in the tenth month of the Hijri year 1241 AH, which is Shawwal of 1241 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1241/10/15 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 22 May 1826 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Shawwal 1241 AH to its equivalent Gregorian date.
وَلَوْ تَرَىٰٓ إِذْ وُقِفُوا۟ عَلَىٰ رَبِّهِمْ ۚ قَالَ أَلَيْسَ هَٰذَا بِٱلْحَقِّ ۚ قَالُوا۟ بَلَىٰ وَرَبِّنَا ۚ قَالَ فَذُوقُوا۟ ٱلْعَذَابَ بِمَا كُنتُمْ تَكْفُرُونَ
If thou couldst see when they are set before their Lord! He will say: Is not this real? They will say: Yea, verily, by our Lord! He will say: Taste now the retribution for that ye used to disbelieve.
Surah Al-An'aam(6:30)