Well, the Hijri date 20 Rabi Al Thani 1384 corresponds to the Gregorian date Thursday, 27 August 1964. This date lies in the fourth month of the Hijri year 1384 AH, which is Rabi Al-Thani of 1384 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1384/04/20 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 27 August 1964 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Thani 1384 AH to its equivalent Gregorian date.
فَلَنُذِيقَنَّ ٱلَّذِينَ كَفَرُوا۟ عَذَابًۭا شَدِيدًۭا وَلَنَجْزِيَنَّهُمْ أَسْوَأَ ٱلَّذِى كَانُوا۟ يَعْمَلُونَ
But verily We shall cause those who disbelieve to taste an awful doom, and verily We shall requite them the worst of what they used to do.
Surah Fussilat(41:27)
Sahih al-Bukhari
Retiring to a Mosque for Remembrance of Allah (I'tikaf)
Chapter: The I'tikaf at night.
Narrated Ibn `Umar:
`Umar asked the Prophet (ﷺ) "I vowed in the Pre-Islamic period of ignorance to stay in I`tikaf for one night in Al-Masjid al-Haram." The Prophet (ﷺ) said to him, "Fulfill your vow."
Sahih al-Bukhari 2032