Well, the Hijri date 17 Rajab 1179 corresponds to the Gregorian date Sunday, 29 December 1765. This date lies in the seventh month of the Hijri year 1179 AH, which is Rajab of 1179 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1179/07/17 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 29 December 1765 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Rajab 1179 AH to its equivalent Gregorian date.
وَٱلَّيْلِ إِذَا يَسْرِ
And the night when it departeth,
Surah Al-Fajr(89:4)