Well, the Hijri date 21 Jumada Al Oula 1359 corresponds to the Gregorian date Thursday, 27 June 1940. This date lies in the fifth month of the Hijri year 1359 AH, which is Jumada Al-Awwal of 1359 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1359/05/21 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 June 1940 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Jumada Al Oula 1359 AH to its equivalent Gregorian date.
كَلَّا سَيَعْلَمُونَ
Nay, but they will come to know!
Surah An-Naba(78:4)
Sahih al-Bukhari
Accepting Information Given by a Truthful Person
Chapter: The Prophet (saws) sent Az-Zubair alone to get information regarding the enemy
Narrated Jabir bin `Abdullah:
On the day of (the battle of) the Trench, the Prophet (ﷺ) called the people (to bring news about the enemy). Az-Zubair responded to his call. He called them again and Az-Zubair responded to his call again; then he called them for the third time and again Az-Zubair responded to his call whereupon the Prophet said, "Every prophet has his Hawairi (helper), and Az-Zubair is my Hawari."
Sahih al-Bukhari 7261