Well, the Hijri date 18 Dhul Qidah 1511 corresponds to the Gregorian date Monday, 7 June 2088. This date lies in the eleventh month of the Hijri year 1511 AH, which is Dhu Al-Qidah of 1511 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1511/11/18 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 7 June 2088 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Qidah 1511 AH to its equivalent Gregorian date.
وَيَٰقَوْمِ لَا يَجْرِمَنَّكُمْ شِقَاقِىٓ أَن يُصِيبَكُم مِّثْلُ مَآ أَصَابَ قَوْمَ نُوحٍ أَوْ قَوْمَ هُودٍ أَوْ قَوْمَ صَٰلِحٍۢ ۚ وَمَا قَوْمُ لُوطٍۢ مِّنكُم بِبَعِيدٍۢ
And, O my people! Let not the schism with me cause you to sin so that there befall you that which befell the folk of Noah and the folk of Hud, and the folk of Salih; and the folk of Lot are not far off from you.
Surah Hud(11:89)