Well, the Hijri date 13 Dhul Qidah 1280 corresponds to the Gregorian date Tuesday, 19 April 1864. This date lies in the eleventh month of the Hijri year 1280 AH, which is Dhu Al-Qidah of 1280 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1280/11/13 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 19 April 1864 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Dhul Qidah 1280 AH to its equivalent Gregorian date.
مَّا لَهُم بِهِۦ مِنْ عِلْمٍۢ وَلَا لِءَابَآئِهِمْ ۚ كَبُرَتْ كَلِمَةًۭ تَخْرُجُ مِنْ أَفْوَٰهِهِمْ ۚ إِن يَقُولُونَ إِلَّا كَذِبًۭا
(A thing) whereof they have no knowledge, nor (had) their fathers, Dreadful is the word that cometh out of their mouths. They speak naught but a lie.
Surah Al-Kahf(18:5)