Well, the Hijri date 12 Jumada Al Akhira 1400 corresponds to the Gregorian date Sunday, 27 April 1980. This date lies in the sixth month of the Hijri year 1400 AH, which is Jumada Al-Thani of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1400/06/12 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 27 April 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Jumada Al Akhira 1400 AH to its equivalent Gregorian date.
هُوَ ٱلَّذِىٓ أَرْسَلَ رَسُولَهُۥ بِٱلْهُدَىٰ وَدِينِ ٱلْحَقِّ لِيُظْهِرَهُۥ عَلَى ٱلدِّينِ كُلِّهِۦ وَلَوْ كَرِهَ ٱلْمُشْرِكُونَ
He it is Who hath sent His messenger with the guidance and the religion of truth, that He may make it conqueror of all religion however much idolaters may be averse.
Surah As-Saff(61:9)