Well, the Hijri date 21 Rabi Al Awwal 1213 corresponds to the Gregorian date Saturday, 1 September 1798. This date lies in the third month of the Hijri year 1213 AH, which is Rabi Al-Awwal of 1213 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1213/03/21 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 1798 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1213 AH to its equivalent Gregorian date.
ذَٰلِكَ بِأَنَّهُمُ ٱسْتَحَبُّوا۟ ٱلْحَيَوٰةَ ٱلدُّنْيَا عَلَى ٱلْءَاخِرَةِ وَأَنَّ ٱللَّهَ لَا يَهْدِى ٱلْقَوْمَ ٱلْكَٰفِرِينَ
That is because they have chosen the life of the world rather than the Hereafter, and because Allah guideth not the disbelieving folk.
Surah An-Nahl(16:107)