Well, the Hijri date 1 Rabi Al Thani 1247 corresponds to the Gregorian date Thursday, 8 September 1831. This date lies in the fourth month of the Hijri year 1247 AH, which is Rabi Al-Thani of 1247 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1247/04/01 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 8 September 1831 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Thani 1247 AH to its equivalent Gregorian date.
أَفَأَصْفَىٰكُمْ رَبُّكُم بِٱلْبَنِينَ وَٱتَّخَذَ مِنَ ٱلْمَلَٰٓئِكَةِ إِنَٰثًا ۚ إِنَّكُمْ لَتَقُولُونَ قَوْلًا عَظِيمًۭا
Hath your Lord then distinguished you (O men of Makka) by giving you sons, and hath chosen for Himself females from among the angels? Lo! verily ye speak an awful word!
Surah Al-Israa(17:40)