Well, the Hijri date 12 Shaban 1377 corresponds to the Gregorian date Sunday, 2 March 1958. This date lies in the eighth month of the Hijri year 1377 AH, which is Shaban of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1377/08/12 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 2 March 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Shaban 1377 AH to its equivalent Gregorian date.
فَرَدَدْنَٰهُ إِلَىٰٓ أُمِّهِۦ كَىْ تَقَرَّ عَيْنُهَا وَلَا تَحْزَنَ وَلِتَعْلَمَ أَنَّ وَعْدَ ٱللَّهِ حَقٌّۭ وَلَٰكِنَّ أَكْثَرَهُمْ لَا يَعْلَمُونَ
So We restored him to his mother that she might be comforted and not grieve, and that she might know that the promise of Allah is true. But most of them know not.
Surah Al-Qasas(28:13)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"Verily, He Who has given you (O Muḥammad pbuh) the Qur'an..." (V.28:85)
Narrated Ibn `Abbas:
Qur'an 28.85'...will bring you home' means to Mecca.
Sahih al-Bukhari 4773