Well, the Hijri date 8 Rabi Al Thani 1439 corresponds to the Gregorian date Tuesday, 26 December 2017. This date lies in the fourth month of the Hijri year 1439 AH, which is Rabi Al-Thani of 1439 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1439/04/08 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 26 December 2017 to its equivalent Arabic date.
The following is the conversion of the Arabic date 8 Rabi Al Thani 1439 AH to its equivalent Gregorian date.
فَإِن تَوَلَّوْا۟ فَقُلْ حَسْبِىَ ٱللَّهُ لَآ إِلَٰهَ إِلَّا هُوَ ۖ عَلَيْهِ تَوَكَّلْتُ ۖ وَهُوَ رَبُّ ٱلْعَرْشِ ٱلْعَظِيمِ
Now, if they turn away (O Muhammad) say: Allah sufficeth me. There is no Allah save Him. In Him have I put my trust, and He is Lord of the Tremendous Throne.
Surah At-Tawba(9:129)