Well, the Hijri date 28 Shaban 1211 corresponds to the Gregorian date Saturday, 25 February 1797. This date lies in the eighth month of the Hijri year 1211 AH, which is Shaban of 1211 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1211/08/28 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 25 February 1797 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Shaban 1211 AH to its equivalent Gregorian date.
فَبِمَا نَقْضِهِم مِّيثَٰقَهُمْ وَكُفْرِهِم بِـَٔايَٰتِ ٱللَّهِ وَقَتْلِهِمُ ٱلْأَنۢبِيَآءَ بِغَيْرِ حَقٍّۢ وَقَوْلِهِمْ قُلُوبُنَا غُلْفٌۢ ۚ بَلْ طَبَعَ ٱللَّهُ عَلَيْهَا بِكُفْرِهِمْ فَلَا يُؤْمِنُونَ إِلَّا قَلِيلًۭا
Then because of their breaking of their covenant, and their disbelieving in the revelations of Allah, and their slaying of the prophets wrongfully, and their saying: Our hearts are hardened - Nay, but Allah set a seal upon them for their disbelief, so that they believe not save a few -
Surah An-Nisaa(4:155)