Well, the Hijri date 21 Dhul Qidah 1491 corresponds to the Gregorian date Monday, 14 January 2069. This date lies in the eleventh month of the Hijri year 1491 AH, which is Dhu Al-Qidah of 1491 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1491/11/21 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 January 2069 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1491 AH to its equivalent Gregorian date.
وَفِى مُوسَىٰٓ إِذْ أَرْسَلْنَٰهُ إِلَىٰ فِرْعَوْنَ بِسُلْطَٰنٍۢ مُّبِينٍۢ
And in Moses (too, there is a portent) when We sent him unto Pharaoh with clear warrant,
Surah Adh-Dhaariyat(51:38)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: Hajjat-ul-Wada
Narrated Hisham's father:
In my presence, Usama was asked about the speed of the Prophet (ﷺ) during his Hajj. He replied, "It was Al-`Anaq (i.e. moderate easy speed) and if he encountered an open space, he used to increase his speed."
Sahih al-Bukhari 4413