Well, the Hijri date 19 Shaban 1340 corresponds to the Gregorian date Sunday, 16 April 1922. This date lies in the eighth month of the Hijri year 1340 AH, which is Shaban of 1340 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1340/08/19 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 April 1922 to its equivalent Arabic date.
The following is the conversion of the Arabic date 19 Shaban 1340 AH to its equivalent Gregorian date.
وَنَزَعَ يَدَهُۥ فَإِذَا هِىَ بَيْضَآءُ لِلنَّٰظِرِينَ
And he drew forth his hand (from his bosom), and lo! it was white for the beholders.
Surah Al-A'raaf(7:108)