Well, the Hijri date 21 Rabi Al Thani 1427 corresponds to the Gregorian date Friday, 19 May 2006. This date lies in the fourth month of the Hijri year 1427 AH, which is Rabi Al-Thani of 1427 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1427/04/21 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 19 May 2006 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1427 AH to its equivalent Gregorian date.
إِذْ تَسْتَغِيثُونَ رَبَّكُمْ فَٱسْتَجَابَ لَكُمْ أَنِّى مُمِدُّكُم بِأَلْفٍۢ مِّنَ ٱلْمَلَٰٓئِكَةِ مُرْدِفِينَ
When ye sought help of your Lord and He answered you (saying): I will help you with a thousand of the angels, rank on rank.
Surah Al-Anfaal(8:9)