Well, the Hijri date 12 Rajab 1247 corresponds to the Gregorian date Friday, 16 December 1831. This date lies in the seventh month of the Hijri year 1247 AH, which is Rajab of 1247 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1247/07/12 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 16 December 1831 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Rajab 1247 AH to its equivalent Gregorian date.
قَالَ يَٰقَوْمِ أَرَءَيْتُمْ إِن كُنتُ عَلَىٰ بَيِّنَةٍۢ مِّن رَّبِّى وَءَاتَىٰنِى مِنْهُ رَحْمَةًۭ فَمَن يَنصُرُنِى مِنَ ٱللَّهِ إِنْ عَصَيْتُهُۥ ۖ فَمَا تَزِيدُونَنِى غَيْرَ تَخْسِيرٍۢ
He said: O my people! Bethink you: if I am (acting) on clear proof from my Lord and there hath come unto me a mercy from Him, who will save me from Allah if I disobey Him? Ye would add to me naught save perdition.
Surah Hud(11:63)