Well, the Hijri date 21 Jumada Al Oula 1215 corresponds to the Gregorian date Thursday, 9 October 1800. This date lies in the fifth month of the Hijri year 1215 AH, which is Jumada Al-Awwal of 1215 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1215/05/21 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 9 October 1800 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Jumada Al Oula 1215 AH to its equivalent Gregorian date.
فَإِن تَابُوا۟ وَأَقَامُوا۟ ٱلصَّلَوٰةَ وَءَاتَوُا۟ ٱلزَّكَوٰةَ فَإِخْوَٰنُكُمْ فِى ٱلدِّينِ ۗ وَنُفَصِّلُ ٱلْءَايَٰتِ لِقَوْمٍۢ يَعْلَمُونَ
But if they repent and establish worship and pay the poor-due, then are they your brethren in religion. We detail Our revelations for a people who have knowledge.
Surah At-Tawba(9:11)