Well, the Hijri date 1 Rabi Al Awwal 1491 corresponds to the Gregorian date Thursday, 3 May 2068. This date lies in the third month of the Hijri year 1491 AH, which is Rabi Al-Awwal of 1491 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1491/03/01 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 3 May 2068 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Awwal 1491 AH to its equivalent Gregorian date.
فَلَمَّا كَشَفْنَا عَنْهُمُ ٱلرِّجْزَ إِلَىٰٓ أَجَلٍ هُم بَٰلِغُوهُ إِذَا هُمْ يَنكُثُونَ
But when We did remove from them the terror for a term which they must reach, behold! they broke their covenant.
Surah Al-A'raaf(7:135)