Well, the Hijri date 27 Rajab 1605 corresponds to the Gregorian date Monday, 3 May 2179. This date lies in the seventh month of the Hijri year 1605 AH, which is Rajab of 1605 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1605/07/27 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 3 May 2179 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rajab 1605 AH to its equivalent Gregorian date.
فَإِن لَّمْ تَجِدُوا۟ فِيهَآ أَحَدًۭا فَلَا تَدْخُلُوهَا حَتَّىٰ يُؤْذَنَ لَكُمْ ۖ وَإِن قِيلَ لَكُمُ ٱرْجِعُوا۟ فَٱرْجِعُوا۟ ۖ هُوَ أَزْكَىٰ لَكُمْ ۚ وَٱللَّهُ بِمَا تَعْمَلُونَ عَلِيمٌۭ
And if ye find no-one therein, still enter not until permission hath been given. And if it be said unto you: Go away again, then go away, for it is purer for you. Allah knoweth what ye do.
Surah An-Noor(24:28)