Well, the Hijri date 30 Jumada Al Oula 1398 corresponds to the Gregorian date Sunday, 7 May 1978. This date lies in the fifth month of the Hijri year 1398 AH, which is Jumada Al-Awwal of 1398 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1398/05/30 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 7 May 1978 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Jumada Al Oula 1398 AH to its equivalent Gregorian date.
أَوَمَن يُنَشَّؤُا۟ فِى ٱلْحِلْيَةِ وَهُوَ فِى ٱلْخِصَامِ غَيْرُ مُبِينٍۢ
(Liken they then to Allah) that which is bred up in outward show, and in dispute cannot make itself plain?
Surah Az-Zukhruf(43:18)