Well, the Hijri date 21 Muharram 1438 corresponds to the Gregorian date Saturday, 22 October 2016. This date lies in the first month of the Hijri year 1438 AH, which is Muharram of 1438 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1438/01/21 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 22 October 2016 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Muharram 1438 AH to its equivalent Gregorian date.
وَإِذَا دُعُوٓا۟ إِلَى ٱللَّهِ وَرَسُولِهِۦ لِيَحْكُمَ بَيْنَهُمْ إِذَا فَرِيقٌۭ مِّنْهُم مُّعْرِضُونَ
Surah An-Noor(24:48)
Sahih al-Bukhari
Merits of the Helpers in Madinah (Ansaar)
Chapter: The marriage of the Prophet (saws) with Khadija رضي الله عنها and her superiority
Narrated `Aisha:
I did not feel jealous of any of the wives of the Prophet (ﷺ) as much as I did of Khadija (although) she died before he married me, for I often heard him mentioning her, and Allah had told him to give her the good tidings that she would have a palace of Qasab (i.e. pipes of precious stones and pearls in Paradise), and whenever he slaughtered a sheep, he would send her women-friends a good share of it.
Sahih al-Bukhari 3816