Well, the Hijri date 8 Rajab 1290 corresponds to the Gregorian date Sunday, 31 August 1873. This date lies in the seventh month of the Hijri year 1290 AH, which is Rajab of 1290 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1290/07/08 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 31 August 1873 to its equivalent Arabic date.
The following is the conversion of the Arabic date 8 Rajab 1290 AH to its equivalent Gregorian date.
وَمَا كَانَ ٱللَّهُ لِيُضِلَّ قَوْمًۢا بَعْدَ إِذْ هَدَىٰهُمْ حَتَّىٰ يُبَيِّنَ لَهُم مَّا يَتَّقُونَ ۚ إِنَّ ٱللَّهَ بِكُلِّ شَىْءٍ عَلِيمٌ
It was never Allah's (part) that He should send a folk astray after He had guided them until He had made clear unto them what they should avoid. Lo! Allah is Aware of all things.
Surah At-Tawba(9:115)