Well, the Hijri date 16 Rajab 1339 corresponds to the Gregorian date Friday, 25 March 1921. This date lies in the seventh month of the Hijri year 1339 AH, which is Rajab of 1339 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1339/07/16 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 25 March 1921 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Rajab 1339 AH to its equivalent Gregorian date.
وَإِذْ قَالَت طَّآئِفَةٌۭ مِّنْهُمْ يَٰٓأَهْلَ يَثْرِبَ لَا مُقَامَ لَكُمْ فَٱرْجِعُوا۟ ۚ وَيَسْتَـْٔذِنُ فَرِيقٌۭ مِّنْهُمُ ٱلنَّبِىَّ يَقُولُونَ إِنَّ بُيُوتَنَا عَوْرَةٌۭ وَمَا هِىَ بِعَوْرَةٍ ۖ إِن يُرِيدُونَ إِلَّا فِرَارًۭا
And when a party of them said: O folk of Yathrib! There is no stand (possible) for you, therefor turn back. And certain of them (even) sought permission of the Prophet, saying: Our homes lie open (to the enemy). And they lay not open. They but wished to flee.
Surah Al-Ahzaab(33:13)