Well, the Hijri date 9 Shaban 1266 corresponds to the Gregorian date Wednesday, 19 June 1850. This date lies in the eighth month of the Hijri year 1266 AH, which is Shaban of 1266 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1266/08/09 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 19 June 1850 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Shaban 1266 AH to its equivalent Gregorian date.
وَإِذَا جَآءُوكُمْ قَالُوٓا۟ ءَامَنَّا وَقَد دَّخَلُوا۟ بِٱلْكُفْرِ وَهُمْ قَدْ خَرَجُوا۟ بِهِۦ ۚ وَٱللَّهُ أَعْلَمُ بِمَا كَانُوا۟ يَكْتُمُونَ
When they come unto you (Muslims), they say: We believe; but they came in unbelief and they went out in the same; and Allah knoweth best what they were hiding.
Surah Al-Maaida(5:61)