Well, the Hijri date 23 Ramadan 1366 corresponds to the Gregorian date Sunday, 10 August 1947. This date lies in the ninth month of the Hijri year 1366 AH, which is Ramadan of 1366 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1366/09/23 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 10 August 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Ramadan 1366 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
Virtues of the Qur'an
Chapter: Forgetting the Qur'an. And can one say: “I forgot such and such a Verse?
Narrated Aisha:
Allah's Messenger (ﷺ) heard a man reciting the Qur'an at night, and said, "May Allah bestow His Mercy on him, as he has reminded me of such-and-such Verses of such-and-such Suras, which I was caused to forget."
Sahih al-Bukhari 5038