Well, the Hijri date 15 Muharram 1412 corresponds to the Gregorian date Friday, 26 July 1991. This date lies in the first month of the Hijri year 1412 AH, which is Muharram of 1412 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1412/01/15 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 July 1991 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Muharram 1412 AH to its equivalent Gregorian date.
فَإِنْ حَآجُّوكَ فَقُلْ أَسْلَمْتُ وَجْهِىَ لِلَّهِ وَمَنِ ٱتَّبَعَنِ ۗ وَقُل لِّلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ وَٱلْأُمِّيِّۦنَ ءَأَسْلَمْتُمْ ۚ فَإِنْ أَسْلَمُوا۟ فَقَدِ ٱهْتَدَوا۟ ۖ وَّإِن تَوَلَّوْا۟ فَإِنَّمَا عَلَيْكَ ٱلْبَلَٰغُ ۗ وَٱللَّهُ بَصِيرٌۢ بِٱلْعِبَادِ
And if they argue with thee, (O Muhammad), say: I have surrendered my purpose to Allah and (so have) those who follow me. And say unto those who have received the Scripture and those who read not: Have ye (too) surrendered? If they surrender, then truly they are rightly guided, and if they turn away, then it is thy duty only to convey the message (unto them). Allah is Seer of (His) bondmen.
Surah Aal-i-Imraan(3:20)