Well, the Hijri date 9 Dhul Hijjah 1212 corresponds to the Gregorian date Thursday, 24 May 1798. This date lies in the twelfth month of the Hijri year 1212 AH, which is Dhu Al-Hijjah of 1212 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1212/12/09 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 24 May 1798 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Dhul Hijjah 1212 AH to its equivalent Gregorian date.
فَإِن زَلَلْتُم مِّنۢ بَعْدِ مَا جَآءَتْكُمُ ٱلْبَيِّنَٰتُ فَٱعْلَمُوٓا۟ أَنَّ ٱللَّهَ عَزِيزٌ حَكِيمٌ
And if ye slide back after the clear proofs have come unto you, then know that Allah is Mighty, Wise.
Surah Al-Baqara(2:209)