Well, the Hijri date 20 Rabi Al Awwal 1356 corresponds to the Gregorian date Sunday, 30 May 1937. This date lies in the third month of the Hijri year 1356 AH, which is Rabi Al-Awwal of 1356 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1356/03/20 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 30 May 1937 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Awwal 1356 AH to its equivalent Gregorian date.
لَلَبِثَ فِى بَطْنِهِۦٓ إِلَىٰ يَوْمِ يُبْعَثُونَ
He would have tarried in its belly till the day when they are raised;
Surah As-Saaffaat(37:144)
Sahih al-Bukhari
Companions of the Prophet
Chapter: Narrations about Usama bin Zaid
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Harmala, the freed slave of Usama bin Zaid said that while he was in the company of 'Abdullah bin 'Umar, Al-Hajjaj bin Aiman came in and (while praying) he did not perform his bowing and prostrations properly. So Ibn 'Umar told him to repeat his prayer. When he went away, Ibn 'Umar asked me, "Who is he?" I said, "Al-Hajjaj bin Um Aiman." Ibn 'Umar said, "If Allah's Messenger (ﷺ) saw him, he would have loved him." Then Ibn 'Umar mentioned the love of the Prophet (ﷺ) for the children of Um Aiman. Sulaiman said that Um Aiman was one of the nurses of the Prophet.
Sahih al-Bukhari 3737