Well, the Hijri date 22 Shaban 1203 corresponds to the Gregorian date Sunday, 17 May 1789. This date lies in the eighth month of the Hijri year 1203 AH, which is Shaban of 1203 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1203/08/22 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 17 May 1789 to its equivalent Arabic date.
The following is the conversion of the Arabic date 22 Shaban 1203 AH to its equivalent Gregorian date.
وَإِن كَذَّبُوكَ فَقُل لِّى عَمَلِى وَلَكُمْ عَمَلُكُمْ ۖ أَنتُم بَرِيٓـُٔونَ مِمَّآ أَعْمَلُ وَأَنَا۠ بَرِىٓءٌۭ مِّمَّا تَعْمَلُونَ
And if they deny thee, say: Unto me my work, and unto you your work. Ye are innocent of what I do, and I am innocent of what ye do.
Surah Yunus(10:41)