Well, the Hijri date 4 Rabi Al Awwal 1237 corresponds to the Gregorian date Wednesday, 28 November 1821. This date lies in the third month of the Hijri year 1237 AH, which is Rabi Al-Awwal of 1237 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1237/03/04 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 28 November 1821 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Rabi Al Awwal 1237 AH to its equivalent Gregorian date.
وَمَآ أَصَٰبَكُمْ يَوْمَ ٱلْتَقَى ٱلْجَمْعَانِ فَبِإِذْنِ ٱللَّهِ وَلِيَعْلَمَ ٱلْمُؤْمِنِينَ
That which befell you, on the day when the two armies met, was by permission of Allah; that He might know the true believers;
Surah Aal-i-Imraan(3:166)