Well, the Hijri date 13 Shawwal 1376 corresponds to the Gregorian date Sunday, 12 May 1957. This date lies in the tenth month of the Hijri year 1376 AH, which is Shawwal of 1376 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1376/10/13 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 12 May 1957 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Shawwal 1376 AH to its equivalent Gregorian date.
فَكَفَرُوا۟ بِهِۦ ۖ فَسَوْفَ يَعْلَمُونَ
Yet (now that it is come) they disbelieve therein; but they will come to know.
Surah As-Saaffaat(37:170)
Sahih al-Bukhari
Divorce
Chapter: Al-Khul' and how a divorce is given according to it
Narrated `Ikrima:
The sister of `Abdullah bin Ubai narrated (the above narration, 197) with the addition that the Prophet (ﷺ) said to Thabit's wife, "Will you return his garden?" She said, "Yes," and returned it, and (then) the Prophet ordered Thabit to divorce her.
Sahih al-Bukhari 5274
