Well, the Hijri date 9 Jumada Al Oula 1366 corresponds to the Gregorian date Monday, 31 March 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 Monday without any doubt. The Arabic date 1366/05/09 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 31 March 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Jumada Al Oula 1366 AH to its equivalent Gregorian date.
إِنَّ فِى ذَٰلِكَ لَءَايَةًۭ لِّمَنْ خَافَ عَذَابَ ٱلْءَاخِرَةِ ۚ ذَٰلِكَ يَوْمٌۭ مَّجْمُوعٌۭ لَّهُ ٱلنَّاسُ وَذَٰلِكَ يَوْمٌۭ مَّشْهُودٌۭ
Lo! herein verily there is a portent for those who fear the doom of the Hereafter. That is a day unto which mankind will be gathered, and that is a day that will be witnessed.
Surah Hud(11:103)
Sahih al-Bukhari
Medicine
Chapter: To do Ruqya by reciting Surat Al-Fatiha.
Narrated Abu Sa`id Al-Khudri:
Some of the companions of the Prophet (ﷺ) came across a tribe amongst the tribes of the Arabs, and that tribe did not entertain them. While they were in that state, the chief of that tribe was bitten by a snake (or stung by a scorpion). They said, (to the companions of the Prophet (ﷺ) ), "Have you got any medicine with you or anybody who can treat with Ruqya?" The Prophet's companions said, "You refuse to entertain us, so we will not treat (your chief) unless you pay us for it." So they agreed to pay them a flock of sheep. One of them (the Prophet's companions) started reciting Surat-al-Fatiha and gathering his saliva and spitting it (at the snake-bite). The patient got cured and his people presented the sheep to them, but they said, "We will not take it unless we ask the Prophet (whether it is lawful)." When they asked him, he smiled and said, "How do you know that Surat-al-Fatiha is a Ruqya? Take it (flock of sheep) and assign a share for me."
Sahih al-Bukhari 5736
