Well, the Hijri date 20 Muharram 1240 corresponds to the Gregorian date Monday, 13 September 1824. This date lies in the first month of the Hijri year 1240 AH, which is Muharram of 1240 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1240/01/20 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 13 September 1824 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Muharram 1240 AH to its equivalent Gregorian date.
قُلْ إِنَّ ٱلْمَوْتَ ٱلَّذِى تَفِرُّونَ مِنْهُ فَإِنَّهُۥ مُلَٰقِيكُمْ ۖ ثُمَّ تُرَدُّونَ إِلَىٰ عَٰلِمِ ٱلْغَيْبِ وَٱلشَّهَٰدَةِ فَيُنَبِّئُكُم بِمَا كُنتُمْ تَعْمَلُونَ
Say (unto them, O Muhammad): Lo! the death from which ye shrink will surely meet you, and afterward ye will be returned unto the Knower of the Invisible and the Visible, and He will tell you what ye used to do.
Surah Al-Jumu'a(62:8)