Well, the Hijri date 9 Rajab 1257 corresponds to the Gregorian date Thursday, 26 August 1841. This date lies in the seventh month of the Hijri year 1257 AH, which is Rajab of 1257 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1257/07/09 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 August 1841 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Rajab 1257 AH to its equivalent Gregorian date.
۞ قُلْ أَؤُنَبِّئُكُم بِخَيْرٍۢ مِّن ذَٰلِكُمْ ۚ لِلَّذِينَ ٱتَّقَوْا۟ عِندَ رَبِّهِمْ جَنَّٰتٌۭ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ خَٰلِدِينَ فِيهَا وَأَزْوَٰجٌۭ مُّطَهَّرَةٌۭ وَرِضْوَٰنٌۭ مِّنَ ٱللَّهِ ۗ وَٱللَّهُ بَصِيرٌۢ بِٱلْعِبَادِ
Say: Shall I inform you of something better than that? For those who keep from evil, with their Lord, are Gardens underneath which rivers flow wherein they will abide, and pure companions, and contentment from Allah. Allah is Seer of His bondmen,
Surah Aal-i-Imraan(3:15)