Well, the Hijri date 15 Rabi Al Thani 1405 corresponds to the Gregorian date Sunday, 6 January 1985. This date lies in the fourth month of the Hijri year 1405 AH, which is Rabi Al-Thani of 1405 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1405/04/15 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 6 January 1985 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1405 AH to its equivalent Gregorian date.
فَٱسْتَخَفَّ قَوْمَهُۥ فَأَطَاعُوهُ ۚ إِنَّهُمْ كَانُوا۟ قَوْمًۭا فَٰسِقِينَ
Thus he persuaded his people to make light (of Moses), and they obeyed him. Lo! they were a wanton folk.
Surah Az-Zukhruf(43:54)
Sahih al-Bukhari
Funerals (Al-Janaa'iz)
Chapter: To seek refuge from the punishment in the grave
Narrated Musa bin `Uqba:
(From the daughter of Khalid bin Sa id bin Al-`Asi) who said that she had heard the Prophet (ﷺ) seeking refuge with Allah from the punishment in the grave.
Sahih al-Bukhari 1376