Well, the Hijri date 28 Dhul Hijjah 1256 corresponds to the Gregorian date Friday, 19 February 1841. This date lies in the twelfth month of the Hijri year 1256 AH, which is Dhu Al-Hijjah of 1256 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1256/12/28 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 19 February 1841 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Dhul Hijjah 1256 AH to its equivalent Gregorian date.
وَمَا نُرِيهِم مِّنْ ءَايَةٍ إِلَّا هِىَ أَكْبَرُ مِنْ أُخْتِهَا ۖ وَأَخَذْنَٰهُم بِٱلْعَذَابِ لَعَلَّهُمْ يَرْجِعُونَ
And every token that We showed them was greater than its sister (token), and We grasped them with the torment, that haply they might turn again.
Surah Az-Zukhruf(43:48)