Well, the Hijri date 26 Jumada Al Oula 1366 corresponds to the Gregorian date Thursday, 17 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 Thursday without any doubt. The Arabic date 1366/05/26 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 17 April 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Jumada Al Oula 1366 AH to its equivalent Gregorian date.
وَلَقَدِ ٱسْتُهْزِئَ بِرُسُلٍۢ مِّن قَبْلِكَ فَأَمْلَيْتُ لِلَّذِينَ كَفَرُوا۟ ثُمَّ أَخَذْتُهُمْ ۖ فَكَيْفَ كَانَ عِقَابِ
And verily messengers (of Allah) were mocked before thee, but long I bore with those who disbelieved. At length I seized them, and how (awful) was My punishment!
Surah Ar-Ra'd(13:32)
Sahih al-Bukhari
Expiation for Unfulfilled Oaths
Chapter: To say: “In sha’ Allah” while taking an oath
Narrated Abu Huraira:
(The Prophet) Solomon said, "Tonight I will sleep with (my) ninety wives, each of whom will get a male child who will fight for Allah's Cause." On that, his companion (Sufyan said that his companion was an angel) said to him, "Say, "If Allah will (Allah willing)." But Solomon forgot (to say it). He slept with all his wives, but none of the women gave birth to a child, except one who gave birth to a halfboy. Abu Huraira added: The Prophet (ﷺ) said, "If Solomon had said, "If Allah will" (Allah willing), he would not have been unsuccessful in his action, and would have attained what he had desired." Once Abu Huraira added: Allah apostle said, "If he had accepted."
Sahih al-Bukhari 6720