Well, the Hijri date 18 Ramadan 1137 corresponds to the Gregorian date Wednesday, 30 May 1725. This date lies in the ninth month of the Hijri year 1137 AH, which is Ramadan of 1137 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1137/09/18 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 30 May 1725 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Ramadan 1137 AH to its equivalent Gregorian date.
وَسَخَّرَ لَكُمُ ٱلشَّمْسَ وَٱلْقَمَرَ دَآئِبَيْنِ ۖ وَسَخَّرَ لَكُمُ ٱلَّيْلَ وَٱلنَّهَارَ
And maketh the sun and the moon, constant in their courses, to be of service unto you, and hath made of service unto you the night and the day.
Surah Ibrahim(14:33)