Well, the Hijri date 23 Ramadan 1377 corresponds to the Gregorian date Saturday, 12 April 1958. This date lies in the ninth month of the Hijri year 1377 AH, which is Ramadan of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1377/09/23 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 April 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Ramadan 1377 AH to its equivalent Gregorian date.
۞ مَّثَلُ ٱلْجَنَّةِ ٱلَّتِى وُعِدَ ٱلْمُتَّقُونَ ۖ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ ۖ أُكُلُهَا دَآئِمٌۭ وَظِلُّهَا ۚ تِلْكَ عُقْبَى ٱلَّذِينَ ٱتَّقَوا۟ ۖ وَّعُقْبَى ٱلْكَٰفِرِينَ ٱلنَّارُ
A similitude of the Garden which is promised unto those who keep their duty (to Allah): Underneath it rivers flow; its food is everlasting, and its shade; this is the reward of those who keep their duty, while the reward of disbelievers is the Fire.
Surah Ar-Ra'd(13:35)
Sahih al-Bukhari
Oaths and Vows
Chapter: If somebody dies without fulfiling a vow
Narrated Sa`id bin 'Ubada Al-Ansari:
that he consulted the Prophet (ﷺ) about a vow that had been made by his mother who died without fulfilling it. The Prophet (ﷺ) gave his verdict that he should fulfill it on her behalf. The verdict became Sunna (i.e. the Prophet's tradition).
Sahih al-Bukhari 6698