Well, the Hijri date 10 Ramadan 1276 corresponds to the Gregorian date Sunday, 1 April 1860. This date lies in the ninth month of the Hijri year 1276 AH, which is Ramadan of 1276 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1276/09/10 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 1 April 1860 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Ramadan 1276 AH to its equivalent Gregorian date.
فَإِذَا رَكِبُوا۟ فِى ٱلْفُلْكِ دَعَوُا۟ ٱللَّهَ مُخْلِصِينَ لَهُ ٱلدِّينَ فَلَمَّا نَجَّىٰهُمْ إِلَى ٱلْبَرِّ إِذَا هُمْ يُشْرِكُونَ
And when they mount upon the ships they pray to Allah, making their faith pure for Him only, but when He bringeth them safe to land, behold! they ascribe partners (unto Him),
Surah Al-Ankaboot(29:65)