Well, the Hijri date 15 Muharram 1237 corresponds to the Gregorian date Thursday, 11 October 1821. This date lies in the first month of the Hijri year 1237 AH, which is Muharram of 1237 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1237/01/15 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 1821 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Muharram 1237 AH to its equivalent Gregorian date.
قَالَ رَبُّ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ وَمَا بَيْنَهُمَآ ۖ إِن كُنتُم مُّوقِنِينَ
(Moses) said: Lord of the heavens and the earth and all that is between them, if ye had but sure belief.
Surah Ash-Shu'araa(26:24)