Well, the Hijri date 18 Muharram 1511 corresponds to the Gregorian date Sunday, 17 August 2087. This date lies in the first month of the Hijri year 1511 AH, which is Muharram of 1511 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1511/01/18 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 17 August 2087 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1511 AH to its equivalent Gregorian date.
إِنَّا لَنَنصُرُ رُسُلَنَا وَٱلَّذِينَ ءَامَنُوا۟ فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا وَيَوْمَ يَقُومُ ٱلْأَشْهَٰدُ
Lo! We verily do help Our messengers, and those who believe, in the life of the world and on the day when the witnesses arise,
Surah Ghafir(40:51)