Well, the Hijri date 21 Rabi Al Awwal 1305 corresponds to the Gregorian date Tuesday, 6 December 1887. This date lies in the third month of the Hijri year 1305 AH, which is Rabi Al-Awwal of 1305 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1305/03/21 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 6 December 1887 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1305 AH to its equivalent Gregorian date.
وَإِن تُطِعْ أَكْثَرَ مَن فِى ٱلْأَرْضِ يُضِلُّوكَ عَن سَبِيلِ ٱللَّهِ ۚ إِن يَتَّبِعُونَ إِلَّا ٱلظَّنَّ وَإِنْ هُمْ إِلَّا يَخْرُصُونَ
If thou obeyedst most of those on earth they would mislead thee far from Allah's way. They follow naught but an opinion, and they do but guess.
Surah Al-An'aam(6:116)