Well, the Hijri date 30 Muharram 1400 corresponds to the Gregorian date Wednesday, 19 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 Wednesday without any doubt. The Arabic date 1400/01/30 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 19 December 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Muharram 1400 AH to its equivalent Gregorian date.
لَا يُقَٰتِلُونَكُمْ جَمِيعًا إِلَّا فِى قُرًۭى مُّحَصَّنَةٍ أَوْ مِن وَرَآءِ جُدُرٍۭ ۚ بَأْسُهُم بَيْنَهُمْ شَدِيدٌۭ ۚ تَحْسَبُهُمْ جَمِيعًۭا وَقُلُوبُهُمْ شَتَّىٰ ۚ ذَٰلِكَ بِأَنَّهُمْ قَوْمٌۭ لَّا يَعْقِلُونَ
They will not fight against you in a body save in fortified villages or from behind walls. Their adversity among themselves is very great. Ye think of them as a whole whereas their hearts are divers. That is because they are a folk who have no sense.
Surah Al-Hashr(59:14)
Sahih al-Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Chapter: The signs of Prophethood in Islam
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "This branch from Quraish will ruin the people." The companions of the Prophet (ﷺ) asked, "What do you order us to do (then)?" He said, "I would suggest that the people keep away from them.''
Sahih al-Bukhari 3604