Well, the Hijri date 21 Rajab 1266 corresponds to the Gregorian date Saturday, 1 June 1850. This date lies in the seventh month of the Hijri year 1266 AH, which is Rajab of 1266 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1266/07/21 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 June 1850 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rajab 1266 AH to its equivalent Gregorian date.
إِن يَمْسَسْكُمْ قَرْحٌۭ فَقَدْ مَسَّ ٱلْقَوْمَ قَرْحٌۭ مِّثْلُهُۥ ۚ وَتِلْكَ ٱلْأَيَّامُ نُدَاوِلُهَا بَيْنَ ٱلنَّاسِ وَلِيَعْلَمَ ٱللَّهُ ٱلَّذِينَ ءَامَنُوا۟ وَيَتَّخِذَ مِنكُمْ شُهَدَآءَ ۗ وَٱللَّهُ لَا يُحِبُّ ٱلظَّٰلِمِينَ
If ye have received a blow, the (disbelieving) people have received a blow the like thereof. These are (only) the vicissitudes which We cause to follow one another for mankind, to the end that Allah may know those who believe and may choose witnesses from among you; and Allah loveth not wrong-doers.
Surah Aal-i-Imraan(3:140)