Well, the Hijri date 5 Muharram 1187 corresponds to the Gregorian date Sunday, 28 March 1773. This date lies in the first month of the Hijri year 1187 AH, which is Muharram of 1187 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1187/01/05 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 28 March 1773 to its equivalent Arabic date.
The following is the conversion of the Arabic date 5 Muharram 1187 AH to its equivalent Gregorian date.
وَإِذْ يَمْكُرُ بِكَ ٱلَّذِينَ كَفَرُوا۟ لِيُثْبِتُوكَ أَوْ يَقْتُلُوكَ أَوْ يُخْرِجُوكَ ۚ وَيَمْكُرُونَ وَيَمْكُرُ ٱللَّهُ ۖ وَٱللَّهُ خَيْرُ ٱلْمَٰكِرِينَ
And when those who disbelieve plot against thee (O Muhammad) to wound thee fatally, or to kill thee or to drive thee forth; they plot, but Allah (also) plotteth; and Allah is the best of plotters.
Surah Al-Anfaal(8:30)