Well, the Hijri date 21 Shawwal 1373 corresponds to the Gregorian date Tuesday, 22 June 1954. This date lies in the tenth month of the Hijri year 1373 AH, which is Shawwal of 1373 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1373/10/21 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 22 June 1954 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shawwal 1373 AH to its equivalent Gregorian date.
مَّن يُصْرَفْ عَنْهُ يَوْمَئِذٍۢ فَقَدْ رَحِمَهُۥ ۚ وَذَٰلِكَ ٱلْفَوْزُ ٱلْمُبِينُ
He from whom (such retribution) is averted on that day, (Allah) hath in truth had mercy on him. That will be the signal triumph.
Surah Al-An'aam(6:16)
Sahih al-Bukhari
Dress
Chapter: What is said about grey hair
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Ibn Mauhab also said that Um Salama had shown him the red hair of the Prophet.
Sahih al-Bukhari 5898