Well, the Hijri date 26 Muharram 1188 corresponds to the Gregorian date Thursday, 7 April 1774. This date lies in the first month of the Hijri year 1188 AH, which is Muharram of 1188 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1188/01/26 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 7 April 1774 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Muharram 1188 AH to its equivalent Gregorian date.
نَّحْنُ أَعْلَمُ بِمَا يَقُولُونَ ۖ وَمَآ أَنتَ عَلَيْهِم بِجَبَّارٍۢ ۖ فَذَكِّرْ بِٱلْقُرْءَانِ مَن يَخَافُ وَعِيدِ
We are Best Aware of what they say, and thou (O Muhammad) art in no wise a compeller over them. But warn by the Qur'an him who feareth My threat.
Surah Qaaf(50:45)