Well, the Hijri date 13 Rabi Al Awwal 1242 corresponds to the Gregorian date Saturday, 14 October 1826. This date lies in the third month of the Hijri year 1242 AH, which is Rabi Al-Awwal of 1242 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1242/03/13 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 14 October 1826 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Rabi Al Awwal 1242 AH to its equivalent Gregorian date.
قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌۭ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلْمُكَذِّبِينَ
Systems have passed away before you. Do but travel in the land and see the nature of the consequence for those who did deny (the messengers).
Surah Aal-i-Imraan(3:137)