Well, the Hijri date 11 Rabi Al Awwal 1412 corresponds to the Gregorian date Thursday, 19 September 1991. This date lies in the third month of the Hijri year 1412 AH, which is Rabi Al-Awwal of 1412 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1412/03/11 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 September 1991 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Rabi Al Awwal 1412 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لِيَسْتَـْٔذِنكُمُ ٱلَّذِينَ مَلَكَتْ أَيْمَٰنُكُمْ وَٱلَّذِينَ لَمْ يَبْلُغُوا۟ ٱلْحُلُمَ مِنكُمْ ثَلَٰثَ مَرَّٰتٍۢ ۚ مِّن قَبْلِ صَلَوٰةِ ٱلْفَجْرِ وَحِينَ تَضَعُونَ ثِيَابَكُم مِّنَ ٱلظَّهِيرَةِ وَمِنۢ بَعْدِ صَلَوٰةِ ٱلْعِشَآءِ ۚ ثَلَٰثُ عَوْرَٰتٍۢ لَّكُمْ ۚ لَيْسَ عَلَيْكُمْ وَلَا عَلَيْهِمْ جُنَاحٌۢ بَعْدَهُنَّ ۚ طَوَّٰفُونَ عَلَيْكُم بَعْضُكُمْ عَلَىٰ بَعْضٍۢ ۚ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمُ ٱلْءَايَٰتِ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌۭ
O ye who believe! Let your slaves, and those of you who have not come to puberty, ask leave of you at three times (before they come into your presence): Before the prayer of dawn, and when ye lay aside your raiment for the heat of noon, and after the prayer of night. Three times of privacy for you. It is no sin for them or for you at other times, when some of you go round attendant upon others (if they come into your presence without leave). Thus Allah maketh clear the revelations for you. Allah is Knower, Wise.
Surah An-Noor(24:58)