Well, the Hijri date 15 Rabi Al Thani 1378 corresponds to the Gregorian date Monday, 27 October 1958. This date lies in the fourth month of the Hijri year 1378 AH, which is Rabi Al-Thani of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1378/04/15 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 October 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1378 AH to its equivalent Gregorian date.
وَلَقَدْ جِئْتُمُونَا فُرَٰدَىٰ كَمَا خَلَقْنَٰكُمْ أَوَّلَ مَرَّةٍۢ وَتَرَكْتُم مَّا خَوَّلْنَٰكُمْ وَرَآءَ ظُهُورِكُمْ ۖ وَمَا نَرَىٰ مَعَكُمْ شُفَعَآءَكُمُ ٱلَّذِينَ زَعَمْتُمْ أَنَّهُمْ فِيكُمْ شُرَكَٰٓؤُا۟ ۚ لَقَد تَّقَطَّعَ بَيْنَكُمْ وَضَلَّ عَنكُم مَّا كُنتُمْ تَزْعُمُونَ
Now have ye come unto Us solitary as We did create you at the first, and ye have left behind you all that We bestowed upon you, and We behold not with you those your intercessors, of whom ye claimed that they possessed a share in you. Now is the bond between you severed, and that which ye presumed hath failed you.
Surah Al-An'aam(6:94)
Sahih al-Bukhari
Good Manners and Form (Al-Adab)
Chapter: Whoever named by the names of the Prophets.
Narrated Abu Musa:
I got a son and I took him to the Prophet (ﷺ) who named him Ibrahim, and put in his mouth the juice of a date fruit (which be himself had chewed?, and invoked for Allah's blessing upon him, and then gave him back to me. He was the eldest son of Abii Musa.
Sahih al-Bukhari 6198