Well, the Hijri date 11 Rabi Al Thani 1373 corresponds to the Gregorian date Thursday, 17 December 1953. This date lies in the fourth month of the Hijri year 1373 AH, which is Rabi Al-Thani of 1373 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1373/04/11 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 December 1953 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Rabi Al Thani 1373 AH to its equivalent Gregorian date.
لَقَالُوٓا۟ إِنَّمَا سُكِّرَتْ أَبْصَٰرُنَا بَلْ نَحْنُ قَوْمٌۭ مَّسْحُورُونَ
They would say: Our sight is wrong - nay, but we are folk bewitched.
Surah Al-Hijr(15:15)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: To shorten the Khutbah the Day of 'Arafat
Narrated Salim bin `Abdullah bin `Umar:
`Abdul-Malik bin Marwan wrote to Al-Hajjaj that he should follow `Abdullah bin `Umar in all the ceremonies of Hajj. So when it was the Day of `Arafat (9th of Dhul-Hijja), and after the sun has deviated or has declined from the middle of the sky, I and Ibn `Umar came and he shouted near the cotton (cloth) tent of Al-Hajjaj, "Where is he?" Al-Hajjaj came out. Ibn `Umar said, "Let us proceed (to `Arafat)." Al-Hajjaj asked, "Just now?" Ibn `Umar replied, "Yes." Al-Hajjaj said, "Wait for me till I pour water on me (i.e. take a bath)." So, Ibn `Umar dismounted (and waited) till Al-Hajjaj came out. He was walking between me and my father. I informed Al-Hajjaj, "If you want to follow the Sunna today, then you should shorten the sermon and then hurry up for the stay (at `Arafat)." Ibn `Umar said, "He (Salim) has spoken the truth."
Sahih al-Bukhari 1663