Well, the Hijri date 12 Jumada Al Akhira 1398 corresponds to the Gregorian date Friday, 19 May 1978. This date lies in the sixth month of the Hijri year 1398 AH, which is Jumada Al-Thani of 1398 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1398/06/12 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 19 May 1978 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Jumada Al Akhira 1398 AH to its equivalent Gregorian date.
يَٰقَوْمَنَآ أَجِيبُوا۟ دَاعِىَ ٱللَّهِ وَءَامِنُوا۟ بِهِۦ يَغْفِرْ لَكُم مِّن ذُنُوبِكُمْ وَيُجِرْكُم مِّنْ عَذَابٍ أَلِيمٍۢ
O our people! respond to Allah's summoner and believe in Him. He will forgive you some of your sins and guard you from a painful doom.
Surah Al-Ahqaf(46:31)