Well, the Hijri date 11 Muharram 1400 corresponds to the Gregorian date Friday, 30 November 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 Friday without any doubt. The Arabic date 1400/01/11 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 30 November 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Muharram 1400 AH to its equivalent Gregorian date.
فَمَا لَهُمْ لَا يُؤْمِنُونَ
What aileth them, then, that they believe not
Surah Al-Inshiqaaq(84:20)
Sahih al-Bukhari
Prophets
Chapter: The Statement of Allah Taa'la: "Verily, in Yusuf and his brethren there were Ayat..."
Narrated `Aisha:
That the Prophet (ﷺ) said (to her). "Order Abu Bakr to lead the people in prayer." She replied," Abu Bakr is a soft-hearted person and when he stands at your place, he will weep (so he will not be able to lead the prayer)." The Prophet (ﷺ) repeated the same order and she gave the same reply. The narrator, Shuba said that the Prophet (ﷺ) said on the third or fourth time. "You are (like) the female companions of Joseph. Order Abu Bakr to lead the prayer. "
Sahih al-Bukhari 3384