Well, the Hijri date 12 Jumada Al Oula 1340 corresponds to the Gregorian date Tuesday, 10 January 1922. This date lies in the fifth month of the Hijri year 1340 AH, which is Jumada Al-Awwal of 1340 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1340/05/12 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 January 1922 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Jumada Al Oula 1340 AH to its equivalent Gregorian date.
وَٱعْلَمُوٓا۟ أَنَّ فِيكُمْ رَسُولَ ٱللَّهِ ۚ لَوْ يُطِيعُكُمْ فِى كَثِيرٍۢ مِّنَ ٱلْأَمْرِ لَعَنِتُّمْ وَلَٰكِنَّ ٱللَّهَ حَبَّبَ إِلَيْكُمُ ٱلْإِيمَٰنَ وَزَيَّنَهُۥ فِى قُلُوبِكُمْ وَكَرَّهَ إِلَيْكُمُ ٱلْكُفْرَ وَٱلْفُسُوقَ وَٱلْعِصْيَانَ ۚ أُو۟لَٰٓئِكَ هُمُ ٱلرَّٰشِدُونَ
And know that the messenger of Allah is among you. If he were to obey you in much of the government, ye would surely be in trouble; but Allah hath endeared the faith to you and hath beautified it in your hearts, and hath made disbelief and lewdness and rebellion hateful unto you. Such are they who are the rightly guided.
Surah Al-Hujuraat(49:7)