Well, the Hijri date 18 Dhul Qidah 1508 corresponds to the Gregorian date Tuesday, 10 July 2085. This date lies in the eleventh month of the Hijri year 1508 AH, which is Dhu Al-Qidah of 1508 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1508/11/18 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 10 July 2085 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Qidah 1508 AH to its equivalent Gregorian date.
فَإِنْ ءَامَنُوا۟ بِمِثْلِ مَآ ءَامَنتُم بِهِۦ فَقَدِ ٱهْتَدَوا۟ ۖ وَّإِن تَوَلَّوْا۟ فَإِنَّمَا هُمْ فِى شِقَاقٍۢ ۖ فَسَيَكْفِيكَهُمُ ٱللَّهُ ۚ وَهُوَ ٱلسَّمِيعُ ٱلْعَلِيمُ
And if they believe in the like of that which ye believe, then are they rightly guided. But if they turn away, then are they in schism, and Allah will suffice thee (for defence) against them. He is the Hearer, the Knower.
Surah Al-Baqara(2:137)