Well, the Hijri date 21 Shaban 1126 corresponds to the Gregorian date Saturday, 1 September 1714. This date lies in the eighth month of the Hijri year 1126 AH, which is Shaban of 1126 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1126/08/21 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 1 September 1714 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shaban 1126 AH to its equivalent Gregorian date.
وَقَالُوا۟ مَا فِى بُطُونِ هَٰذِهِ ٱلْأَنْعَٰمِ خَالِصَةٌۭ لِّذُكُورِنَا وَمُحَرَّمٌ عَلَىٰٓ أَزْوَٰجِنَا ۖ وَإِن يَكُن مَّيْتَةًۭ فَهُمْ فِيهِ شُرَكَآءُ ۚ سَيَجْزِيهِمْ وَصْفَهُمْ ۚ إِنَّهُۥ حَكِيمٌ عَلِيمٌۭ
And they say: That which is in the bellies of such cattle is reserved for our males and is forbidden to our wives; but if it be born dead, then they (all) may be partakers thereof. He will reward them for their attribution (of such ordinances unto Him). Lo, He is Wise, Aware.
Surah Al-An'aam(6:139)