Well, the Hijri date 21 Dhul Qidah 1398 corresponds to the Gregorian date Monday, 23 October 1978. This date lies in the eleventh month of the Hijri year 1398 AH, which is Dhu Al-Qidah of 1398 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1398/11/21 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 23 October 1978 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1398 AH to its equivalent Gregorian date.
أَلَمْ يَرَوْا۟ إِلَى ٱلطَّيْرِ مُسَخَّرَٰتٍۢ فِى جَوِّ ٱلسَّمَآءِ مَا يُمْسِكُهُنَّ إِلَّا ٱللَّهُ ۗ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يُؤْمِنُونَ
Have they not seen the birds obedient in mid-air? None holdeth them save Allah. Lo! herein, verily, are portents for a people who believe.
Surah An-Nahl(16:79)