Well, the Hijri date 21 Rajab 1616 corresponds to the Gregorian date Monday, 28 December 2189. This date lies in the seventh month of the Hijri year 1616 AH, which is Rajab of 1616 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1616/07/21 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 28 December 2189 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rajab 1616 AH to its equivalent Gregorian date.
وَمَا لَكُمْ أَلَّا تَأْكُلُوا۟ مِمَّا ذُكِرَ ٱسْمُ ٱللَّهِ عَلَيْهِ وَقَدْ فَصَّلَ لَكُم مَّا حَرَّمَ عَلَيْكُمْ إِلَّا مَا ٱضْطُرِرْتُمْ إِلَيْهِ ۗ وَإِنَّ كَثِيرًۭا لَّيُضِلُّونَ بِأَهْوَآئِهِم بِغَيْرِ عِلْمٍ ۗ إِنَّ رَبَّكَ هُوَ أَعْلَمُ بِٱلْمُعْتَدِينَ
How should ye not eat of that over which the name of Allah hath been mentioned, when He hath explained unto you that which is forbidden unto you unless ye are compelled thereto. But lo! many are led astray by their own lusts through ignorance. Lo! thy Lord, He is Best Aware of the transgressors.
Surah Al-An'aam(6:119)