Well, the Hijri date 21 Dhul Qidah 1383 corresponds to the Gregorian date Saturday, 4 April 1964. This date lies in the eleventh month of the Hijri year 1383 AH, which is Dhu Al-Qidah of 1383 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1383/11/21 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 4 April 1964 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1383 AH to its equivalent Gregorian date.
فَلَنَأْتِيَنَّكَ بِسِحْرٍۢ مِّثْلِهِۦ فَٱجْعَلْ بَيْنَنَا وَبَيْنَكَ مَوْعِدًۭا لَّا نُخْلِفُهُۥ نَحْنُ وَلَآ أَنتَ مَكَانًۭا سُوًۭى
But we surely can produce for thee magic the like thereof; so appoint a tryst between us and you, which neither we nor thou shall fail to keep, at a place convenient (to us both).
Surah Taa-Haa(20:58)