Well, the Hijri date 13 Rajab 1255 corresponds to the Gregorian date Saturday, 21 September 1839. This date lies in the seventh month of the Hijri year 1255 AH, which is Rajab of 1255 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1255/07/13 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 21 September 1839 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Rajab 1255 AH to its equivalent Gregorian date.
أَفَمَن كَانَ عَلَىٰ بَيِّنَةٍۢ مِّن رَّبِّهِۦ وَيَتْلُوهُ شَاهِدٌۭ مِّنْهُ وَمِن قَبْلِهِۦ كِتَٰبُ مُوسَىٰٓ إِمَامًۭا وَرَحْمَةً ۚ أُو۟لَٰٓئِكَ يُؤْمِنُونَ بِهِۦ ۚ وَمَن يَكْفُرْ بِهِۦ مِنَ ٱلْأَحْزَابِ فَٱلنَّارُ مَوْعِدُهُۥ ۚ فَلَا تَكُ فِى مِرْيَةٍۢ مِّنْهُ ۚ إِنَّهُ ٱلْحَقُّ مِن رَّبِّكَ وَلَٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يُؤْمِنُونَ
Is he (to be counted equal with them) who relieth on a clear proof from his Lord, and a witness from Him reciteth it, and before it was the Book of Moses, an example and a mercy? Such believe therein, and whoso disbelieveth therein of the clans, the Fire is his appointed place. So be not thou in doubt concerning it. Lo! it is the Truth from thy Lord; but most of mankind believe not.
Surah Hud(11:17)
