Well, the Hijri date 11 Safar 1185 corresponds to the Gregorian date Saturday, 25 May 1771. This date lies in the second month of the Hijri year 1185 AH, which is Safar of 1185 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1185/02/11 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 25 May 1771 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Safar 1185 AH to its equivalent Gregorian date.
وَنُفِخَ فِى ٱلصُّورِ ۚ ذَٰلِكَ يَوْمُ ٱلْوَعِيدِ
And the trumpet is blown. This is the threatened Day.
Surah Qaaf(50:20)