Well, the Hijri date 20 Rabi Al Thani 1279 corresponds to the Gregorian date Tuesday, 14 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 Tuesday without any doubt. The Arabic date 1279/04/20 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 October 1862 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Thani 1279 AH to its equivalent Gregorian date.
رَبَّنَا وَٱبْعَثْ فِيهِمْ رَسُولًۭا مِّنْهُمْ يَتْلُوا۟ عَلَيْهِمْ ءَايَٰتِكَ وَيُعَلِّمُهُمُ ٱلْكِتَٰبَ وَٱلْحِكْمَةَ وَيُزَكِّيهِمْ ۚ إِنَّكَ أَنتَ ٱلْعَزِيزُ ٱلْحَكِيمُ
Our Lord! And raise up in their midst a messenger from among them who shall recite unto them Thy revelations, and shall instruct them in the Scripture and in wisdom and shall make them grow. Lo! Thou, only Thou, art the Mighty, Wise.
Surah Al-Baqara(2:129)