Well, the Hijri date 15 Jumada Al Oula 1366 corresponds to the Gregorian date Sunday, 6 April 1947. This date lies in the fifth month of the Hijri year 1366 AH, which is Jumada Al-Awwal of 1366 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1366/05/15 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 6 April 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Jumada Al Oula 1366 AH to its equivalent Gregorian date.
وَإِذْ أَخَذْنَا مِيثَٰقَكُمْ وَرَفَعْنَا فَوْقَكُمُ ٱلطُّورَ خُذُوا۟ مَآ ءَاتَيْنَٰكُم بِقُوَّةٍۢ وَٱسْمَعُوا۟ ۖ قَالُوا۟ سَمِعْنَا وَعَصَيْنَا وَأُشْرِبُوا۟ فِى قُلُوبِهِمُ ٱلْعِجْلَ بِكُفْرِهِمْ ۚ قُلْ بِئْسَمَا يَأْمُرُكُم بِهِۦٓ إِيمَٰنُكُمْ إِن كُنتُم مُّؤْمِنِينَ
And when We made with you a covenant and caused the Mount to tower above you, (saying): Hold fast by that which We have given you, and hear (Our Word), they said: We hear and we rebel. And (worship of) the calf was made to sink into their hearts because of their rejection (of the covenant). Say (unto them): Evil is that which your belief enjoineth on you, if ye are believers.
Surah Al-Baqara(2:93)
Sahih al-Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Chapter: The signs of Prophethood in Islam
Narrated Sa`id Al-Umawi:
I was with Marwan and Abu Huraira and heard Abu Huraira saying, "I heard the trustworthy, truly inspired one (i.e. the Prophet (ﷺ) ) saying, 'The destruction of my followers will be brought about by the hands of some youngsters from Quraish." Marwan asked, "Youngsters?" Abu Huraira said, "If you wish, I would name them: They are the children of so-and-so and the children of so-and-so."
Sahih al-Bukhari 3605