Well, the Hijri date 21 Muharram 1390 corresponds to the Gregorian date Saturday, 28 March 1970. This date lies in the first month of the Hijri year 1390 AH, which is Muharram of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1390/01/21 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 28 March 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Muharram 1390 AH to its equivalent Gregorian date.
يَعْلَمُونَ ظَٰهِرًۭا مِّنَ ٱلْحَيَوٰةِ ٱلدُّنْيَا وَهُمْ عَنِ ٱلْءَاخِرَةِ هُمْ غَٰفِلُونَ
They know only some appearance of the life of the world, and are heedless of the Hereafter.
Surah Ar-Room(30:7)
Sahih al-Bukhari
Oppressions
Chapter: About sheds
Narrated `Umar:
When Allah took away the soul of His Prophet at his death, the Ansar assembled In the shed of Bani Sa`ida. I said to Abu Bakr, "Let us go." So, we come to them (i.e. to Ansar) at the shed of Bani Sa`ida. (See Hadith No. 19, Vol. 5 for details)
Sahih al-Bukhari 2462