Well, the Hijri date 20 Dhul Hijjah 1397 corresponds to the Gregorian date Thursday, 1 December 1977. This date lies in the twelfth month of the Hijri year 1397 AH, which is Dhu Al-Hijjah of 1397 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1397/12/20 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 1 December 1977 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Hijjah 1397 AH to its equivalent Gregorian date.
وَهُوَ ٱلَّذِى جَعَلَكُمْ خَلَٰٓئِفَ ٱلْأَرْضِ وَرَفَعَ بَعْضَكُمْ فَوْقَ بَعْضٍۢ دَرَجَٰتٍۢ لِّيَبْلُوَكُمْ فِى مَآ ءَاتَىٰكُمْ ۗ إِنَّ رَبَّكَ سَرِيعُ ٱلْعِقَابِ وَإِنَّهُۥ لَغَفُورٌۭ رَّحِيمٌۢ
He it is Who hath placed you as viceroys of the earth and hath exalted some of you in rank above others, that He may try you by (the test of) that which He hath given you. Lo! Thy Lord is swift in prosecution, and Lo! He verily is Forgiving, Merciful.
Surah Al-An'aam(6:165)