Well, the Hijri date 30 Muharram 1236 corresponds to the Gregorian date Monday, 6 November 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 Monday without any doubt. The Arabic date 1236/01/30 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 6 November 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Muharram 1236 AH to its equivalent Gregorian date.
وَعُرِضُوا۟ عَلَىٰ رَبِّكَ صَفًّۭا لَّقَدْ جِئْتُمُونَا كَمَا خَلَقْنَٰكُمْ أَوَّلَ مَرَّةٍۭ ۚ بَلْ زَعَمْتُمْ أَلَّن نَّجْعَلَ لَكُم مَّوْعِدًۭا
And they are set before thy Lord in ranks (and it is said unto them): Now verily have ye come unto Us as We created you at the first. But ye thought that We had set no tryst for you.
Surah Al-Kahf(18:48)