Well, the Hijri date 20 Rabi Al Thani 1377 corresponds to the Gregorian date Tuesday, 12 November 1957. This date lies in the fourth month of the Hijri year 1377 AH, which is Rabi Al-Thani of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1377/04/20 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 12 November 1957 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Thani 1377 AH to its equivalent Gregorian date.
أَوْ تَقُولَ حِينَ تَرَى ٱلْعَذَابَ لَوْ أَنَّ لِى كَرَّةًۭ فَأَكُونَ مِنَ ٱلْمُحْسِنِينَ
Or should say, when it seeth the doom: Oh, that I had but a second chance that I might be among the righteous!
Surah Az-Zumar(39:58)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: Hajjat-ul-Wada
Narrated Abu Musa Al-Ash`ari:
I came to the Prophet (ﷺ) at a place called Al-Batha'. The Prophet (ﷺ) said, "Did you assume the Ihram for Hajj?" I said, "Yes," He said, "How did you express your intention (for performing Hajj)? " I said, "Labbaik (i.e. I am ready) to assume the Ihram with the same intention as that of Allah's Messenger (ﷺ)." The Prophet said, "Perform the Tawaf around the Ka`ba and between Safa and Marwa, and then finish your Ihram." So I performed the Tawaf around the Ka`ba and between Safa and Marwa and then I came to a woman from the tribe of Qais who removed the lice from my head.
Sahih al-Bukhari 4397