Well, the Hijri date 11 Jumada Al Oula 1423 corresponds to the Gregorian date Sunday, 21 July 2002. This date lies in the fifth month of the Hijri year 1423 AH, which is Jumada Al-Awwal of 1423 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1423/05/11 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 21 July 2002 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Jumada Al Oula 1423 AH to its equivalent Gregorian date.
فَلَنَسْـَٔلَنَّ ٱلَّذِينَ أُرْسِلَ إِلَيْهِمْ وَلَنَسْـَٔلَنَّ ٱلْمُرْسَلِينَ
Then verily We shall question those unto whom (Our message) hath been sent, and verily We shall question the messengers.
Surah Al-A'raaf(7:6)