Well, the Hijri date 12 Ramadan 1266 corresponds to the Gregorian date Sunday, 21 July 1850. This date lies in the ninth month of the Hijri year 1266 AH, which is Ramadan of 1266 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1266/09/12 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 21 July 1850 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Ramadan 1266 AH to its equivalent Gregorian date.
فَلَوْلَا كَانَ مِنَ ٱلْقُرُونِ مِن قَبْلِكُمْ أُو۟لُوا۟ بَقِيَّةٍۢ يَنْهَوْنَ عَنِ ٱلْفَسَادِ فِى ٱلْأَرْضِ إِلَّا قَلِيلًۭا مِّمَّنْ أَنجَيْنَا مِنْهُمْ ۗ وَٱتَّبَعَ ٱلَّذِينَ ظَلَمُوا۟ مَآ أُتْرِفُوا۟ فِيهِ وَكَانُوا۟ مُجْرِمِينَ
If only there had been among the generations before you men possessing a remnant (of good sense) to warn (their people) from corruption in the earth, as did a few of those whom We saved from them! The wrong-doers followed that by which they were made sapless, and were guilty.
Surah Hud(11:116)