Well, the Hijri date 20 Dhul Hijjah 1203 corresponds to the Gregorian date Thursday, 10 September 1789. This date lies in the twelfth month of the Hijri year 1203 AH, which is Dhu Al-Hijjah of 1203 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1203/12/20 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 10 September 1789 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Hijjah 1203 AH to its equivalent Gregorian date.
إِنَّ ٱللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍۢ ۖ وَإِن تَكُ حَسَنَةًۭ يُضَٰعِفْهَا وَيُؤْتِ مِن لَّدُنْهُ أَجْرًا عَظِيمًۭا
Lo! Allah wrongeth not even of the weight of an ant; and if there is a good deed, He will double it and will give (the doer) from His presence an immense reward.
Surah An-Nisaa(4:40)