Well, the Hijri date 1 Shawwal 1491 corresponds to the Gregorian date Monday, 26 November 2068. This date lies in the tenth month of the Hijri year 1491 AH, which is Shawwal of 1491 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1491/10/01 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 26 November 2068 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Shawwal 1491 AH to its equivalent Gregorian date.
وَلِيَعْلَمَ ٱلَّذِينَ أُوتُوا۟ ٱلْعِلْمَ أَنَّهُ ٱلْحَقُّ مِن رَّبِّكَ فَيُؤْمِنُوا۟ بِهِۦ فَتُخْبِتَ لَهُۥ قُلُوبُهُمْ ۗ وَإِنَّ ٱللَّهَ لَهَادِ ٱلَّذِينَ ءَامَنُوٓا۟ إِلَىٰ صِرَٰطٍۢ مُّسْتَقِيمٍۢ
And that those who have been given knowledge may know that it is the truth from thy Lord, so that they may believe therein and their hearts may submit humbly unto Him. Lo! Allah verily is guiding those who believe unto a right path.
Surah Al-Hajj(22:54)