Well, the Hijri date 21 Dhul Hijjah 1237 corresponds to the Gregorian date Saturday, 7 September 1822. This date lies in the twelfth month of the Hijri year 1237 AH, which is Dhu Al-Hijjah of 1237 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1237/12/21 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 7 September 1822 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Hijjah 1237 AH to its equivalent Gregorian date.
۞ قَدْ يَعْلَمُ ٱللَّهُ ٱلْمُعَوِّقِينَ مِنكُمْ وَٱلْقَآئِلِينَ لِإِخْوَٰنِهِمْ هَلُمَّ إِلَيْنَا ۖ وَلَا يَأْتُونَ ٱلْبَأْسَ إِلَّا قَلِيلًا
Allah already knoweth those of you who hinder, and those who say unto their brethren: "Come ye hither unto us!" and they come not to the stress of battle save a little,
Surah Al-Ahzaab(33:18)