Well, the Hijri date 1 Rabi Al Thani 1390 corresponds to the Gregorian date Friday, 5 June 1970. This date lies in the fourth month of the Hijri year 1390 AH, which is Rabi Al-Thani of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1390/04/01 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 5 June 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Thani 1390 AH to its equivalent Gregorian date.
بَلْ مَتَّعْنَا هَٰٓؤُلَآءِ وَءَابَآءَهُمْ حَتَّىٰ طَالَ عَلَيْهِمُ ٱلْعُمُرُ ۗ أَفَلَا يَرَوْنَ أَنَّا نَأْتِى ٱلْأَرْضَ نَنقُصُهَا مِنْ أَطْرَافِهَآ ۚ أَفَهُمُ ٱلْغَٰلِبُونَ
Nay, but We gave these and their fathers ease until life grew long for them. See they not how we aim to the land, reducing it of its outlying parts? Can they then be the victors?
Surah Al-Anbiyaa(21:44)