Well, the Hijri date 12 Shaban 1409 corresponds to the Gregorian date Sunday, 19 March 1989. This date lies in the eighth month of the Hijri year 1409 AH, which is Shaban of 1409 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1409/08/12 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 19 March 1989 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Shaban 1409 AH to its equivalent Gregorian date.
وَنَزَعْنَا مِن كُلِّ أُمَّةٍۢ شَهِيدًۭا فَقُلْنَا هَاتُوا۟ بُرْهَٰنَكُمْ فَعَلِمُوٓا۟ أَنَّ ٱلْحَقَّ لِلَّهِ وَضَلَّ عَنْهُم مَّا كَانُوا۟ يَفْتَرُونَ
And We shall take out from every nation a witness and We shall say: Bring your proof. Then they will know that Allah hath the Truth, and all that they invented will have failed them.
Surah Al-Qasas(28:75)