Well, the Hijri date 17 Shawwal 1242 corresponds to the Gregorian date Sunday, 13 May 1827. This date lies in the tenth month of the Hijri year 1242 AH, which is Shawwal of 1242 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1242/10/17 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 13 May 1827 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Shawwal 1242 AH to its equivalent Gregorian date.
ٱلَّتِى تَطَّلِعُ عَلَى ٱلْأَفْـِٔدَةِ
Which leapeth up over the hearts (of men).
Surah Al-Humaza(104:7)