Well, the Hijri date 21 Shawwal 1427 corresponds to the Gregorian date Sunday, 12 November 2006. This date lies in the tenth month of the Hijri year 1427 AH, which is Shawwal of 1427 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1427/10/21 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 12 November 2006 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shawwal 1427 AH to its equivalent Gregorian date.
ٱلْأَعْرَابُ أَشَدُّ كُفْرًۭا وَنِفَاقًۭا وَأَجْدَرُ أَلَّا يَعْلَمُوا۟ حُدُودَ مَآ أَنزَلَ ٱللَّهُ عَلَىٰ رَسُولِهِۦ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌۭ
The wandering Arabs are more hard in disbelief and hypocrisy, and more likely to be ignorant of the limits which Allah hath revealed unto His messenger. And Allah is Knower, Wise.
Surah At-Tawba(9:97)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"So, fall you down in prostration to Allah, and worship Him (Alone) ." (V.53:62)
Narrated Ibn `Abbas:
The Prophet (ﷺ) performed a prostration when he finished reciting Surat-an-Najm, and all the Muslims and pagans and Jinns and human beings prostrated along with him.
Sahih al-Bukhari 4862