Well, the Hijri date 29 Muharram 1185 corresponds to the Gregorian date Monday, 13 May 1771. This date lies in the first month of the Hijri year 1185 AH, which is Muharram of 1185 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1185/01/29 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 13 May 1771 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Muharram 1185 AH to its equivalent Gregorian date.
قَالُوا۟ ٱدْعُ لَنَا رَبَّكَ يُبَيِّن لَّنَا مَا هِىَ ۚ قَالَ إِنَّهُۥ يَقُولُ إِنَّهَا بَقَرَةٌۭ لَّا فَارِضٌۭ وَلَا بِكْرٌ عَوَانٌۢ بَيْنَ ذَٰلِكَ ۖ فَٱفْعَلُوا۟ مَا تُؤْمَرُونَ
They said: Pray for us unto thy Lord that He make clear to us what (cow) she is. (Moses) answered: Lo! He saith, Verily she is a cow neither with calf nor immature; (she is) between the two conditions; so do that which ye are commanded.
Surah Al-Baqara(2:68)