Well, the Hijri date 18 Muharram 1400 corresponds to the Gregorian date Friday, 7 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 Friday without any doubt. The Arabic date 1400/01/18 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 7 December 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1400 AH to its equivalent Gregorian date.
قَٰتِلُوا۟ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱللَّهِ وَلَا بِٱلْيَوْمِ ٱلْءَاخِرِ وَلَا يُحَرِّمُونَ مَا حَرَّمَ ٱللَّهُ وَرَسُولُهُۥ وَلَا يَدِينُونَ دِينَ ٱلْحَقِّ مِنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ حَتَّىٰ يُعْطُوا۟ ٱلْجِزْيَةَ عَن يَدٍۢ وَهُمْ صَٰغِرُونَ
Fight against such of those who have been given the Scripture as believe not in Allah nor the Last Day, and forbid not that which Allah hath forbidden by His messenger, and follow not the Religion of Truth, until they pay the tribute readily, being brought low.
Surah At-Tawba(9:29)
Sahih al-Bukhari
Fighting for the Cause of Allah (Jihaad)
Chapter: (The reward of) the injured in Allah's Cause
Narrated Jundab bin Sufyan:
In one of the holy Battles a finger of Allah's Messenger (ﷺ) (got wounded and) bled. He said, "You are just a finger that bled, and what you got is in Allah's Cause."
Sahih al-Bukhari 2802
