Well, the Hijri date 11 Muharram 1404 corresponds to the Gregorian date Monday, 17 October 1983. This date lies in the first month of the Hijri year 1404 AH, which is Muharram of 1404 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1404/01/11 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 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Muharram 1404 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ أَنفِقُوا۟ مِمَّا رَزَقْنَٰكُم مِّن قَبْلِ أَن يَأْتِىَ يَوْمٌۭ لَّا بَيْعٌۭ فِيهِ وَلَا خُلَّةٌۭ وَلَا شَفَٰعَةٌۭ ۗ وَٱلْكَٰفِرُونَ هُمُ ٱلظَّٰلِمُونَ
Surah Al-Baqara(2:254)
Sahih al-Bukhari
Funerals (Al-Janaa'iz)
Chapter: The graves of the Prophet (pbuh), Abu Bakr, and Umar Radiyallahu Anhu
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Aisha narrated that she made a will to `Abdullah bin Zubair, "Do not bury me with them (the Prophet (ﷺ) and his two companions) but bury me with my companions (wives of the Prophet (p.b.u.h) ) in Al-Baqi as I would not like to be looked upon as better than I really am (by being buried near the Prophet)."
Sahih al-Bukhari 1391