Well, the Hijri date 15 Rabi Al Thani 1279 corresponds to the Gregorian date Thursday, 9 October 1862. This date lies in the fourth month of the Hijri year 1279 AH, which is Rabi Al-Thani of 1279 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1279/04/15 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 9 October 1862 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1279 AH to its equivalent Gregorian date.
وَلَا تَتَّخِذُوٓا۟ أَيْمَٰنَكُمْ دَخَلًۢا بَيْنَكُمْ فَتَزِلَّ قَدَمٌۢ بَعْدَ ثُبُوتِهَا وَتَذُوقُوا۟ ٱلسُّوٓءَ بِمَا صَدَدتُّمْ عَن سَبِيلِ ٱللَّهِ ۖ وَلَكُمْ عَذَابٌ عَظِيمٌۭ
Make not your oaths a deceit between you, lest a foot should slip after being firmly planted and ye should taste evil forasmuch as ye debarred (men) from the way of Allah, and yours should be an awful doom.
Surah An-Nahl(16:94)