Well, the Hijri date 27 Rabi Al Thani 1405 corresponds to the Gregorian date Friday, 18 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 Friday without any doubt. The Arabic date 1405/04/27 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 18 January 1985 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rabi Al Thani 1405 AH to its equivalent Gregorian date.
إِنَّا كَذَٰلِكَ نَجْزِى ٱلْمُحْسِنِينَ
Lo! thus do We reward the good.
Surah As-Saaffaat(37:131)
Sahih al-Bukhari
Fasting
Chapter: "We neither write nor know accounts."
Narrated Ibn `Umar:
The Prophet (ﷺ) said, "We are an illiterate nation; we neither write, nor know accounts. The month is like this and this, i.e. sometimes of 29 days and sometimes of thirty days."
Sahih al-Bukhari 1913