Well, the Hijri date 11 Dhul Hijjah 1180 corresponds to the Gregorian date Saturday, 9 May 1767. This date lies in the twelfth month of the Hijri year 1180 AH, which is Dhu Al-Hijjah of 1180 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1180/12/11 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 9 May 1767 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Dhul Hijjah 1180 AH to its equivalent Gregorian date.
وَإِذَا جَآءَكَ ٱلَّذِينَ يُؤْمِنُونَ بِـَٔايَٰتِنَا فَقُلْ سَلَٰمٌ عَلَيْكُمْ ۖ كَتَبَ رَبُّكُمْ عَلَىٰ نَفْسِهِ ٱلرَّحْمَةَ ۖ أَنَّهُۥ مَنْ عَمِلَ مِنكُمْ سُوٓءًۢا بِجَهَٰلَةٍۢ ثُمَّ تَابَ مِنۢ بَعْدِهِۦ وَأَصْلَحَ فَأَنَّهُۥ غَفُورٌۭ رَّحِيمٌۭ
And when those who believe in Our revelations come unto thee, say: Peace be unto you! Your Lord hath prescribed for Himself mercy, that whoso of you doeth evil through ignorance and repenteth afterward thereof and doeth right, (for him) lo! He is Forgiving, Merciful.
Surah Al-An'aam(6:54)