Well, the Hijri date 18 Muharram 1504 corresponds to the Gregorian date Thursday, 31 October 2080. This date lies in the first month of the Hijri year 1504 AH, which is Muharram of 1504 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1504/01/18 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 31 October 2080 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1504 AH to its equivalent Gregorian date.
فَإِن تَوَلَّوْا۟ فَقُلْ ءَاذَنتُكُمْ عَلَىٰ سَوَآءٍۢ ۖ وَإِنْ أَدْرِىٓ أَقَرِيبٌ أَم بَعِيدٌۭ مَّا تُوعَدُونَ
But if they are averse, then say: I have warned you all alike, although I know not whether nigh or far is that which ye are promised.
Surah Al-Anbiyaa(21:109)