Well, the Hijri date 23 Rabi Al Awwal 1220 corresponds to the Gregorian date Thursday, 20 June 1805. This date lies in the third month of the Hijri year 1220 AH, which is Rabi Al-Awwal of 1220 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1220/03/23 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 June 1805 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Rabi Al Awwal 1220 AH to its equivalent Gregorian date.
حَقِيقٌ عَلَىٰٓ أَن لَّآ أَقُولَ عَلَى ٱللَّهِ إِلَّا ٱلْحَقَّ ۚ قَدْ جِئْتُكُم بِبَيِّنَةٍۢ مِّن رَّبِّكُمْ فَأَرْسِلْ مَعِىَ بَنِىٓ إِسْرَٰٓءِيلَ
Approved upon condition that I speak concerning Allah nothing but the truth. I come unto you (lords of Egypt) with a clear proof from your Lord. So let the Children of Israel go with me.
Surah Al-A'raaf(7:105)