Well, the Hijri date 30 Shaban 1420 corresponds to the Gregorian date Wednesday, 8 December 1999. This date lies in the eighth month of the Hijri year 1420 AH, which is Shaban of 1420 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1420/08/30 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 December 1999 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Shaban 1420 AH to its equivalent Gregorian date.
إِنَّ ٱلَّذِينَ كَفَرُوا۟ بَعْدَ إِيمَٰنِهِمْ ثُمَّ ٱزْدَادُوا۟ كُفْرًۭا لَّن تُقْبَلَ تَوْبَتُهُمْ وَأُو۟لَٰٓئِكَ هُمُ ٱلضَّآلُّونَ
Lo! those who disbelieve after their (profession of) belief, and afterward grow violent in disbelief: their repentance will not be accepted. And such are those who are astray.
Surah Aal-i-Imraan(3:90)