Well, the Hijri date 29 Shawwal 1199 corresponds to the Gregorian date Saturday, 3 September 1785. This date lies in the tenth month of the Hijri year 1199 AH, which is Shawwal of 1199 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1199/10/29 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 3 September 1785 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Shawwal 1199 AH to its equivalent Gregorian date.
وَمَا قَدَرُوا۟ ٱللَّهَ حَقَّ قَدْرِهِۦ وَٱلْأَرْضُ جَمِيعًۭا قَبْضَتُهُۥ يَوْمَ ٱلْقِيَٰمَةِ وَٱلسَّمَٰوَٰتُ مَطْوِيَّٰتٌۢ بِيَمِينِهِۦ ۚ سُبْحَٰنَهُۥ وَتَعَٰلَىٰ عَمَّا يُشْرِكُونَ
And they esteem not Allah as He hath the right to be esteemed, when the whole earth is His handful on the Day of Resurrection, and the heavens are rolled in His right hand. Glorified is He and High Exalted from all that they ascribe as partner (unto Him).
Surah Az-Zumar(39:67)