Well, the Hijri date 9 Rabi Al Awwal 1187 corresponds to the Gregorian date Sunday, 30 May 1773. This date lies in the third month of the Hijri year 1187 AH, which is Rabi Al-Awwal of 1187 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1187/03/09 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 1773 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Rabi Al Awwal 1187 AH to its equivalent Gregorian date.
قِيلَ يَٰنُوحُ ٱهْبِطْ بِسَلَٰمٍۢ مِّنَّا وَبَرَكَٰتٍ عَلَيْكَ وَعَلَىٰٓ أُمَمٍۢ مِّمَّن مَّعَكَ ۚ وَأُمَمٌۭ سَنُمَتِّعُهُمْ ثُمَّ يَمَسُّهُم مِّنَّا عَذَابٌ أَلِيمٌۭ
It was said (unto him): O Noah! Go thou down (from the mountain) with peace from Us and blessings upon thee and some nations (that will spring) from those with thee. (There will be other) nations unto whom We shall give enjoyment a long while and then a painful doom from Us will overtake them.
Surah Hud(11:48)