Well, the Hijri date 18 Rabi Al Thani 1400 corresponds to the Gregorian date Wednesday, 5 March 1980. This date lies in the fourth month of the Hijri year 1400 AH, which is Rabi Al-Thani of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1400/04/18 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 5 March 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1400 AH to its equivalent Gregorian date.
قُلْ مَن يُنَجِّيكُم مِّن ظُلُمَٰتِ ٱلْبَرِّ وَٱلْبَحْرِ تَدْعُونَهُۥ تَضَرُّعًۭا وَخُفْيَةًۭ لَّئِنْ أَنجَىٰنَا مِنْ هَٰذِهِۦ لَنَكُونَنَّ مِنَ ٱلشَّٰكِرِينَ
Say: Who delivereth you from the darkness of the land and the sea? Ye call upon Him humbly and in secret, (saying): If we are delivered from this (fear) we truly will be of the thankful.
Surah Al-An'aam(6:63)
Sahih al-Bukhari
Knowledge
Chapter: The sin of a person who tells a lie against the Prophet (saws)
Narrated Anas:
The fact which stops me from narrating a great number of Hadiths to you is that the Prophet (ﷺ) said: "Whoever tells a lie against me intentionally, then (surely) let him occupy his seat in Hell-fire."
Sahih al-Bukhari 108