Well, the Hijri date 26 Rabi Al Thani 1308 corresponds to the Gregorian date Monday, 8 December 1890. This date lies in the fourth month of the Hijri year 1308 AH, which is Rabi Al-Thani of 1308 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1308/04/26 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 8 December 1890 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Rabi Al Thani 1308 AH to its equivalent Gregorian date.
وَقَالُوا۟ لَوْ شَآءَ ٱلرَّحْمَٰنُ مَا عَبَدْنَٰهُم ۗ مَّا لَهُم بِذَٰلِكَ مِنْ عِلْمٍ ۖ إِنْ هُمْ إِلَّا يَخْرُصُونَ
And they say: If the Beneficent One had (so) willed, we should not have worshipped them. They have no knowledge whatsoever of that. They do but guess.
Surah Az-Zukhruf(43:20)