Well, the Hijri date 21 Shaban 1458 corresponds to the Gregorian date Saturday, 11 October 2036. This date lies in the eighth month of the Hijri year 1458 AH, which is Shaban of 1458 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1458/08/21 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 11 October 2036 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shaban 1458 AH to its equivalent Gregorian date.
۞ وَلَقَدْ جَآءَكُم مُّوسَىٰ بِٱلْبَيِّنَٰتِ ثُمَّ ٱتَّخَذْتُمُ ٱلْعِجْلَ مِنۢ بَعْدِهِۦ وَأَنتُمْ ظَٰلِمُونَ
And Moses came unto you with clear proofs (of Allah's Sovereignty), yet, while he was away, ye chose the calf (for worship) and ye were wrong-doers.
Surah Al-Baqara(2:92)