Well, the Hijri date 12 Dhul Hijjah 1257 corresponds to the Gregorian date Monday, 24 January 1842. This date lies in the twelfth month of the Hijri year 1257 AH, which is Dhu Al-Hijjah of 1257 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1257/12/12 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 24 January 1842 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Dhul Hijjah 1257 AH to its equivalent Gregorian date.
۞ قُلْ أَئِنَّكُمْ لَتَكْفُرُونَ بِٱلَّذِى خَلَقَ ٱلْأَرْضَ فِى يَوْمَيْنِ وَتَجْعَلُونَ لَهُۥٓ أَندَادًۭا ۚ ذَٰلِكَ رَبُّ ٱلْعَٰلَمِينَ
Say (O Muhammad, unto the idolaters): Disbelieve ye verily in Him Who created the earth in two Days, and ascribe ye unto Him rivals? He (and none else) is the Lord of the Worlds.
Surah Fussilat(41:9)