Well, the Hijri date 21 Muharram 1400 corresponds to the Gregorian date Monday, 10 December 1979. This date lies in the first month of the Hijri year 1400 AH, which is Muharram of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1400/01/21 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 10 December 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Muharram 1400 AH to its equivalent Gregorian date.
إِنَّ ٱللَّهَ لَا يَغْفِرُ أَن يُشْرَكَ بِهِۦ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَن يَشَآءُ ۚ وَمَن يُشْرِكْ بِٱللَّهِ فَقَدِ ٱفْتَرَىٰٓ إِثْمًا عَظِيمًا
Lo! Allah forgiveth not that a partner should be ascribed unto Him. He forgiveth (all) save that to whom He will. Whoso ascribeth partners to Allah, he hath indeed invented a tremendous sin.
Surah An-Nisaa(4:48)
Sahih al-Bukhari
Representation, Authorization, Business by Proxy
Chapter: To depute a trustworthy treasurer
Narrated Abu Musa:
The Prophet (ﷺ) said, "An honest treasurer who gives what he is ordered to give fully, perfectly and willingly to the person to whom he is ordered to give, is regarded as one of the two charitable persons."
Sahih al-Bukhari 2319
