Well, the Hijri date 14 Shaban 1256 corresponds to the Gregorian date Saturday, 10 October 1840. This date lies in the eighth month of the Hijri year 1256 AH, which is Shaban of 1256 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1256/08/14 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 10 October 1840 to its equivalent Arabic date.
The following is the conversion of the Arabic date 14 Shaban 1256 AH to its equivalent Gregorian date.
فَإِذَا رَكِبُوا۟ فِى ٱلْفُلْكِ دَعَوُا۟ ٱللَّهَ مُخْلِصِينَ لَهُ ٱلدِّينَ فَلَمَّا نَجَّىٰهُمْ إِلَى ٱلْبَرِّ إِذَا هُمْ يُشْرِكُونَ
And when they mount upon the ships they pray to Allah, making their faith pure for Him only, but when He bringeth them safe to land, behold! they ascribe partners (unto Him),
Surah Al-Ankaboot(29:65)