Well, the Hijri date 14 Rajab 1200 corresponds to the Gregorian date Friday, 12 May 1786. This date lies in the seventh month of the Hijri year 1200 AH, which is Rajab of 1200 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1200/07/14 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 12 May 1786 to its equivalent Arabic date.
The following is the conversion of the Arabic date 14 Rajab 1200 AH to its equivalent Gregorian date.
قَدْ نَعْلَمُ إِنَّهُۥ لَيَحْزُنُكَ ٱلَّذِى يَقُولُونَ ۖ فَإِنَّهُمْ لَا يُكَذِّبُونَكَ وَلَٰكِنَّ ٱلظَّٰلِمِينَ بِـَٔايَٰتِ ٱللَّهِ يَجْحَدُونَ
We know well how their talk grieveth thee, though in truth they deny not thee (Muhammad) but evil-doers flout the revelations of Allah.
Surah Al-An'aam(6:33)