Well, the Hijri date 12 Shawwal 1257 corresponds to the Gregorian date Friday, 26 November 1841. This date lies in the tenth month of the Hijri year 1257 AH, which is Shawwal of 1257 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1257/10/12 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 26 November 1841 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Shawwal 1257 AH to its equivalent Gregorian date.
وَكَذَٰلِكَ أَنزَلْنَآ إِلَيْكَ ٱلْكِتَٰبَ ۚ فَٱلَّذِينَ ءَاتَيْنَٰهُمُ ٱلْكِتَٰبَ يُؤْمِنُونَ بِهِۦ ۖ وَمِنْ هَٰٓؤُلَآءِ مَن يُؤْمِنُ بِهِۦ ۚ وَمَا يَجْحَدُ بِـَٔايَٰتِنَآ إِلَّا ٱلْكَٰفِرُونَ
In like manner We have revealed unto thee the Scripture, and those unto whom We gave the Scripture aforetime will believe therein; and of these (also) there are some who believe therein. And none deny Our revelations save the disbelievers.
Surah Al-Ankaboot(29:47)