Well, the Hijri date 26 Rabi Al Awwal 1512 corresponds to the Gregorian date Monday, 11 October 2088. This date lies in the third month of the Hijri year 1512 AH, which is Rabi Al-Awwal of 1512 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1512/03/26 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 11 October 2088 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Rabi Al Awwal 1512 AH to its equivalent Gregorian date.
وَأَمَّا مَنْ أُوتِىَ كِتَٰبَهُۥ بِشِمَالِهِۦ فَيَقُولُ يَٰلَيْتَنِى لَمْ أُوتَ كِتَٰبِيَهْ
But as for him who is given his record in his left hand, he will say: Oh, would that I had not been given my book
Surah Al-Haaqqa(69:25)