Well, the Hijri date 20 Dhul Hijjah 1383 corresponds to the Gregorian date Saturday, 2 May 1964. This date lies in the twelfth month of the Hijri year 1383 AH, which is Dhu Al-Hijjah of 1383 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1383/12/20 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 2 May 1964 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Hijjah 1383 AH to its equivalent Gregorian date.
۞ وَلَوْ أَنَّنَا نَزَّلْنَآ إِلَيْهِمُ ٱلْمَلَٰٓئِكَةَ وَكَلَّمَهُمُ ٱلْمَوْتَىٰ وَحَشَرْنَا عَلَيْهِمْ كُلَّ شَىْءٍۢ قُبُلًۭا مَّا كَانُوا۟ لِيُؤْمِنُوٓا۟ إِلَّآ أَن يَشَآءَ ٱللَّهُ وَلَٰكِنَّ أَكْثَرَهُمْ يَجْهَلُونَ
And though We should send down the angels unto them, and the dead should speak unto them, and We should gather against them all things in array, they would not believe unless Allah so willed. Howbeit, most of them are ignorant.
Surah Al-An'aam(6:111)
Sahih al-Bukhari
Belief
Chapter: (What is said regarding the superiority of) a person who embraces Islam sincerely.
Narrated Abu Sa'id Al Khudri:
Allah's Messenger (ﷺ) said, "If a person embraces Islam sincerely, then Allah shall forgive all his past sins, and after that starts the settlement of accounts, the reward of his good deeds will be ten times to seven hundred times for each good deed and one evil deed will be recorded as it is unless Allah forgives it."
Sahih al-Bukhari 41