Well, the Hijri date 18 Shawwal 1203 corresponds to the Gregorian date Saturday, 11 July 1789. This date lies in the tenth month of the Hijri year 1203 AH, which is Shawwal of 1203 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1203/10/18 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 11 July 1789 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Shawwal 1203 AH to its equivalent Gregorian date.
إِنَّ ٱلْمُنَٰفِقِينَ يُخَٰدِعُونَ ٱللَّهَ وَهُوَ خَٰدِعُهُمْ وَإِذَا قَامُوٓا۟ إِلَى ٱلصَّلَوٰةِ قَامُوا۟ كُسَالَىٰ يُرَآءُونَ ٱلنَّاسَ وَلَا يَذْكُرُونَ ٱللَّهَ إِلَّا قَلِيلًۭا
Lo! the hypocrites seek to beguile Allah, but it is He Who beguileth them. When they stand up to worship they perform it languidly and to be seen of men, and are mindful of Allah but little;
Surah An-Nisaa(4:142)