Well, the Hijri date 21 Rabi Al Thani 1604 corresponds to the Gregorian date Monday, 9 February 2178. This date lies in the fourth month of the Hijri year 1604 AH, which is Rabi Al-Thani of 1604 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1604/04/21 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 9 February 2178 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1604 AH to its equivalent Gregorian date.
حُنَفَآءَ لِلَّهِ غَيْرَ مُشْرِكِينَ بِهِۦ ۚ وَمَن يُشْرِكْ بِٱللَّهِ فَكَأَنَّمَا خَرَّ مِنَ ٱلسَّمَآءِ فَتَخْطَفُهُ ٱلطَّيْرُ أَوْ تَهْوِى بِهِ ٱلرِّيحُ فِى مَكَانٍۢ سَحِيقٍۢ
Turning unto Allah (only), not ascribing partners unto Him; for whoso ascribeth partners unto Allah, it is as if he had fallen from the sky and the birds had snatched him or the wind had blown him to a far-off place.
Surah Al-Hajj(22:31)