Well, the Hijri date 12 Jumada Al Akhira 1230 corresponds to the Gregorian date Sunday, 21 May 1815. This date lies in the sixth month of the Hijri year 1230 AH, which is Jumada Al-Thani of 1230 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1230/06/12 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 May 1815 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Jumada Al Akhira 1230 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن تُطِيعُوا۟ فَرِيقًۭا مِّنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ يَرُدُّوكُم بَعْدَ إِيمَٰنِكُمْ كَٰفِرِينَ
O ye who believe! If ye obey a party of those who have received the Scripture they will make you disbelievers after your belief.
Surah Aal-i-Imraan(3:100)