Well, the Hijri date 15 Rabi Al Thani 1259 corresponds to the Gregorian date Sunday, 14 May 1843. This date lies in the fourth month of the Hijri year 1259 AH, which is Rabi Al-Thani of 1259 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1259/04/15 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 14 May 1843 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1259 AH to its equivalent Gregorian date.
وَيَٰقَوْمِ هَٰذِهِۦ نَاقَةُ ٱللَّهِ لَكُمْ ءَايَةًۭ فَذَرُوهَا تَأْكُلْ فِىٓ أَرْضِ ٱللَّهِ وَلَا تَمَسُّوهَا بِسُوٓءٍۢ فَيَأْخُذَكُمْ عَذَابٌۭ قَرِيبٌۭ
O my people! This is the camel of Allah, a token unto you, so suffer her to feed in Allah's earth, and touch her not with harm lest a near torment seize you.
Surah Hud(11:64)