Well, the Hijri date 6 Rabi Al Awwal 1398 corresponds to the Gregorian date Monday, 13 February 1978. This date lies in the third month of the Hijri year 1398 AH, which is Rabi Al-Awwal of 1398 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1398/03/06 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 13 February 1978 to its equivalent Arabic date.
The following is the conversion of the Arabic date 6 Rabi Al Awwal 1398 AH to its equivalent Gregorian date.
وَكَأَيِّن مِّن نَّبِىٍّۢ قَٰتَلَ مَعَهُۥ رِبِّيُّونَ كَثِيرٌۭ فَمَا وَهَنُوا۟ لِمَآ أَصَابَهُمْ فِى سَبِيلِ ٱللَّهِ وَمَا ضَعُفُوا۟ وَمَا ٱسْتَكَانُوا۟ ۗ وَٱللَّهُ يُحِبُّ ٱلصَّٰبِرِينَ
And with how many a prophet have there been a number of devoted men who fought (beside him). They quailed not for aught that befell them in the way of Allah, nor did they weaken, nor were they brought low. Allah loveth the steadfast.
Surah Aal-i-Imraan(3:146)