Well, the Hijri date 4 Rajab 1427 corresponds to the Gregorian date Saturday, 29 July 2006. This date lies in the seventh month of the Hijri year 1427 AH, which is Rajab of 1427 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1427/07/04 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 29 July 2006 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Rajab 1427 AH to its equivalent Gregorian date.
قُل لِّلَّذِينَ كَفَرُوٓا۟ إِن يَنتَهُوا۟ يُغْفَرْ لَهُم مَّا قَدْ سَلَفَ وَإِن يَعُودُوا۟ فَقَدْ مَضَتْ سُنَّتُ ٱلْأَوَّلِينَ
Tell those who disbelieve that if they cease (from persecution of believers) that which is past will be forgiven them; but if they return (thereto) then the example of the men of old hath already gone (before them, for a warning).
Surah Al-Anfaal(8:38)