Well, the Hijri date 12 Rabi Al Awwal 1230 corresponds to the Gregorian date Tuesday, 21 February 1815. This date lies in the third month of the Hijri year 1230 AH, which is Rabi Al-Awwal of 1230 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1230/03/12 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 February 1815 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Rabi Al Awwal 1230 AH to its equivalent Gregorian date.
أَمَّا ٱلسَّفِينَةُ فَكَانَتْ لِمَسَٰكِينَ يَعْمَلُونَ فِى ٱلْبَحْرِ فَأَرَدتُّ أَنْ أَعِيبَهَا وَكَانَ وَرَآءَهُم مَّلِكٌۭ يَأْخُذُ كُلَّ سَفِينَةٍ غَصْبًۭا
As for the ship, it belonged to poor people working on the river, and I wished to mar it, for there was a king behind them who is taking every ship by force.
Surah Al-Kahf(18:79)