Well, the Hijri date 16 Ramadan 1213 corresponds to the Gregorian date Wednesday, 20 February 1799. This date lies in the ninth month of the Hijri year 1213 AH, which is Ramadan of 1213 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1213/09/16 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 20 February 1799 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Ramadan 1213 AH to its equivalent Gregorian date.
لِيُبَيِّنَ لَهُمُ ٱلَّذِى يَخْتَلِفُونَ فِيهِ وَلِيَعْلَمَ ٱلَّذِينَ كَفَرُوٓا۟ أَنَّهُمْ كَانُوا۟ كَٰذِبِينَ
That He may explain unto them that wherein they differ, and that those who disbelieved may know that they were liars.
Surah An-Nahl(16:39)