Well, the Hijri date 13 Jumada Al Akhira 1339 corresponds to the Gregorian date Monday, 21 February 1921. This date lies in the sixth month of the Hijri year 1339 AH, which is Jumada Al-Thani of 1339 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1339/06/13 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 21 February 1921 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Jumada Al Akhira 1339 AH to its equivalent Gregorian date.
۞ فَمَا لَكُمْ فِى ٱلْمُنَٰفِقِينَ فِئَتَيْنِ وَٱللَّهُ أَرْكَسَهُم بِمَا كَسَبُوٓا۟ ۚ أَتُرِيدُونَ أَن تَهْدُوا۟ مَنْ أَضَلَّ ٱللَّهُ ۖ وَمَن يُضْلِلِ ٱللَّهُ فَلَن تَجِدَ لَهُۥ سَبِيلًۭا
What aileth you that ye are become two parties regarding the hypocrites, when Allah cast them back (to disbelief) because of what they earned? Seek ye to guide him whom Allah hath sent astray? He whom Allah sendeth astray, for him thou (O MUhammad) canst not find a road.
Surah An-Nisaa(4:88)