Well, the Hijri date 18 Muharram 1133 corresponds to the Gregorian date Monday, 18 November 1720. This date lies in the first month of the Hijri year 1133 AH, which is Muharram of 1133 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1133/01/18 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 18 November 1720 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1133 AH to its equivalent Gregorian date.
بَلْ نَقْذِفُ بِٱلْحَقِّ عَلَى ٱلْبَٰطِلِ فَيَدْمَغُهُۥ فَإِذَا هُوَ زَاهِقٌۭ ۚ وَلَكُمُ ٱلْوَيْلُ مِمَّا تَصِفُونَ
Nay, but We hurl the true against the false, and it doth break its head and lo! it vanisheth. And yours will be woe for that which ye ascribe (unto Him).
Surah Al-Anbiyaa(21:18)