Well, the Hijri date 20 Shawwal 1323 corresponds to the Gregorian date Saturday, 16 December 1905. This date lies in the tenth month of the Hijri year 1323 AH, which is Shawwal of 1323 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1323/10/20 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 16 December 1905 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Shawwal 1323 AH to its equivalent Gregorian date.
وَإِذْ أَخَذَ رَبُّكَ مِنۢ بَنِىٓ ءَادَمَ مِن ظُهُورِهِمْ ذُرِّيَّتَهُمْ وَأَشْهَدَهُمْ عَلَىٰٓ أَنفُسِهِمْ أَلَسْتُ بِرَبِّكُمْ ۖ قَالُوا۟ بَلَىٰ ۛ شَهِدْنَآ ۛ أَن تَقُولُوا۟ يَوْمَ ٱلْقِيَٰمَةِ إِنَّا كُنَّا عَنْ هَٰذَا غَٰفِلِينَ
And (remember) when thy Lord brought forth from the Children of Adam, from their reins, their seed, and made them testify of themselves, (saying): Am I not your Lord? They said: Yea, verily. We testify. (That was) lest ye should say at the Day of Resurrection: Lo! of this we were unaware;
Surah Al-A'raaf(7:172)