Well, the Hijri date 20 Dhul Hijjah 1324 corresponds to the Gregorian date Sunday, 3 February 1907. This date lies in the twelfth month of the Hijri year 1324 AH, which is Dhu Al-Hijjah of 1324 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1324/12/20 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 3 February 1907 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Hijjah 1324 AH to its equivalent Gregorian date.
فَإِن كَذَّبُوكَ فَقُل رَّبُّكُمْ ذُو رَحْمَةٍۢ وَٰسِعَةٍۢ وَلَا يُرَدُّ بَأْسُهُۥ عَنِ ٱلْقَوْمِ ٱلْمُجْرِمِينَ
So if they give the lie to thee (Muhammad), say: Your Lord is a Lord of All-Embracing Mercy, and His wrath will never be withdrawn from guilty folk.
Surah Al-An'aam(6:147)