Well, the Hijri date 6 Rajab 1420 corresponds to the Gregorian date Friday, 15 October 1999. This date lies in the seventh month of the Hijri year 1420 AH, which is Rajab of 1420 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1420/07/06 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 15 October 1999 to its equivalent Arabic date.
The following is the conversion of the Arabic date 6 Rajab 1420 AH to its equivalent Gregorian date.
فَأَجْمِعُوا۟ كَيْدَكُمْ ثُمَّ ٱئْتُوا۟ صَفًّۭا ۚ وَقَدْ أَفْلَحَ ٱلْيَوْمَ مَنِ ٱسْتَعْلَىٰ
So arrange your plan, and come in battle line. Whoso is uppermost this day will be indeed successful.
Surah Taa-Haa(20:64)