Well, the Hijri date 10 Muharram 1236 corresponds to the Gregorian date Tuesday, 17 October 1820. This date lies in the first month of the Hijri year 1236 AH, which is Muharram of 1236 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1236/01/10 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 17 October 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Muharram 1236 AH to its equivalent Gregorian date.
تِلْكَ ٱلْقُرَىٰ نَقُصُّ عَلَيْكَ مِنْ أَنۢبَآئِهَا ۚ وَلَقَدْ جَآءَتْهُمْ رُسُلُهُم بِٱلْبَيِّنَٰتِ فَمَا كَانُوا۟ لِيُؤْمِنُوا۟ بِمَا كَذَّبُوا۟ مِن قَبْلُ ۚ كَذَٰلِكَ يَطْبَعُ ٱللَّهُ عَلَىٰ قُلُوبِ ٱلْكَٰفِرِينَ
Such were the townships. We relate some tidings of them unto thee (Muhammad). Their messengers verily came unto them with clear proofs (of Allah's Sovereignty), but they could not believe because they had before denied. Thus doth Allah print upon the hearts of disbelievers (that they hear not).
Surah Al-A'raaf(7:101)