Well, the Hijri date 10 Ramadan 1340 corresponds to the Gregorian date Sunday, 7 May 1922. This date lies in the ninth month of the Hijri year 1340 AH, which is Ramadan of 1340 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1340/09/10 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 7 May 1922 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Ramadan 1340 AH to its equivalent Gregorian date.
وَقَالَ لِلَّذِى ظَنَّ أَنَّهُۥ نَاجٍۢ مِّنْهُمَا ٱذْكُرْنِى عِندَ رَبِّكَ فَأَنسَىٰهُ ٱلشَّيْطَٰنُ ذِكْرَ رَبِّهِۦ فَلَبِثَ فِى ٱلسِّجْنِ بِضْعَ سِنِينَ
And he said unto him of the twain who he knew would be released: Mention me in the presence of thy lord. But Satan caused him to forget to mention it to his lord, so he (Joseph) stayed in prison for some years.
Surah Yusuf(12:42)