Well, the Hijri date 16 Shawwal 1378 corresponds to the Gregorian date Friday, 24 April 1959. This date lies in the tenth month of the Hijri year 1378 AH, which is Shawwal of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1378/10/16 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 24 April 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Shawwal 1378 AH to its equivalent Gregorian date.
۞ وَلَوْ أَرَادُوا۟ ٱلْخُرُوجَ لَأَعَدُّوا۟ لَهُۥ عُدَّةًۭ وَلَٰكِن كَرِهَ ٱللَّهُ ٱنۢبِعَاثَهُمْ فَثَبَّطَهُمْ وَقِيلَ ٱقْعُدُوا۟ مَعَ ٱلْقَٰعِدِينَ
And if they had wished to go forth they would assuredly have made ready some equipment, but Allah was averse to their being sent forth and held them back and it was said (unto them): Sit ye with the sedentary!
Surah At-Tawba(9:46)
Sahih al-Bukhari
Mortgaging
Chapter: Dispute between the mortgagor and mortgagee
Narrated Ibn Abu Mulaika:
I wrote a letter to Ibn `Abbas and he wrote to me that the Prophet (ﷺ) had given the verdict that the defendant had to take an oath.
Sahih al-Bukhari 2514