Well, the Hijri date 29 Shawwal 1220 corresponds to the Gregorian date Sunday, 19 January 1806. This date lies in the tenth month of the Hijri year 1220 AH, which is Shawwal of 1220 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1220/10/29 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 January 1806 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Shawwal 1220 AH to its equivalent Gregorian date.
ٱلسَّمَآءُ مُنفَطِرٌۢ بِهِۦ ۚ كَانَ وَعْدُهُۥ مَفْعُولًا
The very heaven being then rent asunder. His promise is to be fulfilled.
Surah Al-Muzzammil(73:18)