Well, the Hijri date 11 Jumada Al Oula 1403 corresponds to the Gregorian date Thursday, 24 February 1983. This date lies in the fifth month of the Hijri year 1403 AH, which is Jumada Al-Awwal of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1403/05/11 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 24 February 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Jumada Al Oula 1403 AH to its equivalent Gregorian date.
وَلَوْ شَآءَ رَبُّكَ لَجَعَلَ ٱلنَّاسَ أُمَّةًۭ وَٰحِدَةًۭ ۖ وَلَا يَزَالُونَ مُخْتَلِفِينَ
And if thy Lord had willed, He verily would have made mankind one nation, yet they cease not differing,
Surah Hud(11:118)