Well, the Hijri date 30 Jumada Al Oula 1366 corresponds to the Gregorian date Monday, 21 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 Monday without any doubt. The Arabic date 1366/05/30 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 21 April 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Jumada Al Oula 1366 AH to its equivalent Gregorian date.
وَسَبِّحُوهُ بُكْرَةًۭ وَأَصِيلًا
And glorify Him early and late.
Surah Al-Ahzaab(33:42)
Sahih al-Bukhari
Call to Prayers (Adhaan)
Chapter: If there are many travellers, Adhan and Iqama should be pronounced, (the same is to be observed) in 'Arafat and Al-Muzdalifa too
Narrated Abu Dhar:
We were in the company of the Prophet (ﷺ) on a journey and the Mu'adh-dhin wanted to pronounce the Adhan for the (Zuhr) prayer. The Prophet (ﷺ) said to him, "Let it become cooler." Then he again wanted to pronounce the Adhan but the Prophet; said to him, "Let it become cooler." The Mu'adh-dhin again wanted to pronounce the Adhan for the prayer but the Prophet (ﷺ) said, "Let it become cooler," till the shadows of the hillocks become equal to their sizes. The Prophet (ﷺ) added, "The severity of the heat is from the raging of Hell."
Sahih al-Bukhari 629