Well, the Hijri date 21 Rabi Al Thani 1373 corresponds to the Gregorian date Sunday, 27 December 1953. This date lies in the fourth month of the Hijri year 1373 AH, which is Rabi Al-Thani of 1373 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1373/04/21 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 December 1953 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1373 AH to its equivalent Gregorian date.
وَإِنَّ رَبَّكَ لَهُوَ ٱلْعَزِيزُ ٱلرَّحِيمُ
And lo! thy Lord! He is indeed the Mighty, the Merciful.
Surah Ash-Shu'araa(26:159)
Sahih al-Bukhari
One-fifth of Booty to the Cause of Allah (Khumus)
Chapter: The houses of the wives of the Prophet saws
Narrated Aisha:
That Allah's Messenger (ﷺ) used to offer the `Asr prayer while the sun was still shining in her Hujra (i.e. her dwelling place).
Sahih al-Bukhari 3103