Well, the Hijri date 18 Dhul Hijjah 1311 corresponds to the Gregorian date Thursday, 21 June 1894. This date lies in the twelfth month of the Hijri year 1311 AH, which is Dhu Al-Hijjah of 1311 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1311/12/18 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 June 1894 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Hijjah 1311 AH to its equivalent Gregorian date.
فَدَلَّىٰهُمَا بِغُرُورٍۢ ۚ فَلَمَّا ذَاقَا ٱلشَّجَرَةَ بَدَتْ لَهُمَا سَوْءَٰتُهُمَا وَطَفِقَا يَخْصِفَانِ عَلَيْهِمَا مِن وَرَقِ ٱلْجَنَّةِ ۖ وَنَادَىٰهُمَا رَبُّهُمَآ أَلَمْ أَنْهَكُمَا عَن تِلْكُمَا ٱلشَّجَرَةِ وَأَقُل لَّكُمَآ إِنَّ ٱلشَّيْطَٰنَ لَكُمَا عَدُوٌّۭ مُّبِينٌۭ
Thus did he lead them on with guile. And when they tasted of the tree their shame was manifest to them and they began to hide (by heaping) on themselves some of the leaves of the Garden. And their Lord called them, (saying): Did I not forbid you from that tree and tell you: Lo! Satan is an open enemy to you?
Surah Al-A'raaf(7:22)