Well, the Hijri date 11 Shawwal 1251 corresponds to the Gregorian date Friday, 29 January 1836. This date lies in the tenth month of the Hijri year 1251 AH, which is Shawwal of 1251 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1251/10/11 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 29 January 1836 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Shawwal 1251 AH to its equivalent Gregorian date.
وَقَالَتْ أُولَىٰهُمْ لِأُخْرَىٰهُمْ فَمَا كَانَ لَكُمْ عَلَيْنَا مِن فَضْلٍۢ فَذُوقُوا۟ ٱلْعَذَابَ بِمَا كُنتُمْ تَكْسِبُونَ
And the first of them saith unto the last of them: Ye were no whit better than us, so taste the doom for what ye used to earn.
Surah Al-A'raaf(7:39)