Well, the Hijri date 21 Rabi Al Thani 1375 corresponds to the Gregorian date Monday, 5 December 1955. This date lies in the fourth month of the Hijri year 1375 AH, which is Rabi Al-Thani of 1375 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1375/04/21 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 5 December 1955 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1375 AH to its equivalent Gregorian date.
أَوَأَمِنَ أَهْلُ ٱلْقُرَىٰٓ أَن يَأْتِيَهُم بَأْسُنَا ضُحًۭى وَهُمْ يَلْعَبُونَ
Or are the people of the townships then secure from the coming of Our wrath upon them in the daytime while they play?
Surah Al-A'raaf(7:98)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"But no, by your Lord, they can have no Faith, until they make you (Muhammad ﷺ ) judge in all disputes between them..." (V.4:65)
Narrated `Urwa:
Az-Zubair quarrelled with a man from the Ansar because of a natural mountainous stream at Al-Harra. The Prophet (ﷺ) said "O Zubair! Irrigate (your lands and the let the water flow to your neighbor The Ansar said, "O Allah's Messenger (ﷺ) (This is because) he (Zubair) is your cousin?" At that, the Prophet's face became red (with anger) and he said "O Zubair! Irrigate (your land) and then withhold the water till it fills the land up to the walls and then let it flow to your neighbor." So the Prophet (ﷺ) enabled Az- Zubair to take his full right after the Ansari provoked his anger. The Prophet (ﷺ) had previously given a order that was in favor of both of them Az-Zubair said, "I don't think but the Verse was revealed in this connection: "But no, by your Lord, they can have no faith, until they make you judge in all disputes between them." (4.65)
Sahih al-Bukhari 4585