Well, the Hijri date 28 Shaban 1240 corresponds to the Gregorian date Saturday, 16 April 1825. This date lies in the eighth month of the Hijri year 1240 AH, which is Shaban of 1240 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1240/08/28 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 16 April 1825 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Shaban 1240 AH to its equivalent Gregorian date.
قُلْ أَرَءَيْتُمْ إِن كَانَ مِنْ عِندِ ٱللَّهِ وَكَفَرْتُم بِهِۦ وَشَهِدَ شَاهِدٌۭ مِّنۢ بَنِىٓ إِسْرَٰٓءِيلَ عَلَىٰ مِثْلِهِۦ فَـَٔامَنَ وَٱسْتَكْبَرْتُمْ ۖ إِنَّ ٱللَّهَ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّٰلِمِينَ
Bethink you: If it is from Allah and ye disbelieve therein, and a witness of the Children of Israel hath already testified to the like thereof and hath believed, and ye are too proud (what plight is yours)? Lo! Allah guideth not wrong-doing folk.
Surah Al-Ahqaf(46:10)