Well, the Hijri date 23 Dhul Hijjah 1439 corresponds to the Gregorian date Monday, 3 September 2018. This date lies in the twelfth month of the Hijri year 1439 AH, which is Dhu Al-Hijjah of 1439 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1439/12/23 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 3 September 2018 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Dhul Hijjah 1439 AH to its equivalent Gregorian date.
هَلْ يَنظُرُونَ إِلَّآ أَن يَأْتِيَهُمُ ٱللَّهُ فِى ظُلَلٍۢ مِّنَ ٱلْغَمَامِ وَٱلْمَلَٰٓئِكَةُ وَقُضِىَ ٱلْأَمْرُ ۚ وَإِلَى ٱللَّهِ تُرْجَعُ ٱلْأُمُورُ
Wait they for naught else than that Allah should come unto them in the shadows of the clouds with the angels? Then the case would be already judged. All cases go back to Allah (for judgment).
Surah Al-Baqara(2:210)