Well, the Hijri date 23 Rabi Al Awwal 1390 corresponds to the Gregorian date Thursday, 28 May 1970. This date lies in the third month of the Hijri year 1390 AH, which is Rabi Al-Awwal of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1390/03/23 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 28 May 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Rabi Al Awwal 1390 AH to its equivalent Gregorian date.
فَذَرْنِى وَمَن يُكَذِّبُ بِهَٰذَا ٱلْحَدِيثِ ۖ سَنَسْتَدْرِجُهُم مِّنْ حَيْثُ لَا يَعْلَمُونَ
Leave Me (to deal) with those who give the lie to this pronouncement. We shall lead them on by steps from whence they know not.
Surah Al-Qalam(68:44)