Well, the Hijri date 21 Rabi Al Awwal 1357 corresponds to the Gregorian date Saturday, 21 May 1938. This date lies in the third month of the Hijri year 1357 AH, which is Rabi Al-Awwal of 1357 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1357/03/21 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 21 May 1938 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1357 AH to its equivalent Gregorian date.
قَالُوا۟ يَٰوَيْلَنَآ إِنَّا كُنَّا طَٰغِينَ
They said: Alas for us! In truth we were outrageous.
Surah Al-Qalam(68:31)
Sahih al-Bukhari
Oaths and Vows
Chapter: "Do not swear by your fathers"
Narrated Ibn `Umar:
Allah's Messenger (ﷺ) met `Umar bin Al-Khattab while the latter was going with a group of camel-riders, and he was swearing by his father. The Prophet (ﷺ) said, "Lo! Allah forbids you to swear by your fathers, so whoever has to take an oath, he should swear by Allah or keep quiet."
Sahih al-Bukhari 6646