Well, the Hijri date 14 Rajab 1366 corresponds to the Gregorian date Tuesday, 3 June 1947. This date lies in the seventh month of the Hijri year 1366 AH, which is Rajab of 1366 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1366/07/14 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 3 June 1947 to its equivalent Arabic date.
The following is the conversion of the Arabic date 14 Rajab 1366 AH to its equivalent Gregorian date.
فَذَرْهُمْ فِى غَمْرَتِهِمْ حَتَّىٰ حِينٍ
So leave them in their error till a time.
Surah Al-Muminoon(23:54)
Sahih al-Bukhari
Penalty of Hunting while on Pilgrimage
Chapter: Performing Hajj for a person who cannot sit firmly on the mount
Narrated `Abdullah bin `Abbas:
Al-Fadl was riding behind the Prophet (ﷺ) and a woman from the tribe of Khath'am came up. Al-Fadl started looking at her and she looked at him. The Prophet (ﷺ) turned Al-Fadl's face to the other side. She said, "My father has come under Allah's obligation of performing Hajj but he is a very old man and cannot sit properly on his Mount. Shall I perform Hajj on his behalf? The Prophet (ﷺ) replied in the affirmative. That happened during Hajjat-al-Wada` of the Prophet (ﷺ) .
Sahih al-Bukhari 1854