Well, the Hijri date 21 Muharram 1381 corresponds to the Gregorian date Tuesday, 4 July 1961. This date lies in the first month of the Hijri year 1381 AH, which is Muharram of 1381 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1381/01/21 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 4 July 1961 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Muharram 1381 AH to its equivalent Gregorian date.
وَسَخَّرَ لَكُمُ ٱلَّيْلَ وَٱلنَّهَارَ وَٱلشَّمْسَ وَٱلْقَمَرَ ۖ وَٱلنُّجُومُ مُسَخَّرَٰتٌۢ بِأَمْرِهِۦٓ ۗ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يَعْقِلُونَ
And He hath constrained the night and the day and the sun and the moon to be of service unto you, and the stars are made subservient by His command. Lo! herein indeed are portents for people who have sense.
Surah An-Nahl(16:12)
Sahih al-Bukhari
Penalty of Hunting while on Pilgrimage
Chapter: If an Izar is not available, one can wear trousers
Narrated Ibn `Abbas:
The Prophet (ﷺ) delivered a sermon at `Arafat and said, "Whoever does not get an Izar can wear trousers, and whoever cannot get a pair of shoes can wear Khuffs (socks made from thick fabric or leather)."
Sahih al-Bukhari 1843