Well, the Hijri date 20 Shawwal 1307 corresponds to the Gregorian date Sunday, 8 June 1890. This date lies in the tenth month of the Hijri year 1307 AH, which is Shawwal of 1307 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1307/10/20 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 8 June 1890 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Shawwal 1307 AH to its equivalent Gregorian date.
هُوَ ٱلَّذِىٓ أَرْسَلَ رَسُولَهُۥ بِٱلْهُدَىٰ وَدِينِ ٱلْحَقِّ لِيُظْهِرَهُۥ عَلَى ٱلدِّينِ كُلِّهِۦ وَلَوْ كَرِهَ ٱلْمُشْرِكُونَ
He it is Who hath sent His messenger with the guidance and the Religion of Truth, that He may cause it to prevail over all religion, however much the idolaters may be averse.
Surah At-Tawba(9:33)