Well, the Hijri date 21 Muharram 1437 corresponds to the Gregorian date Tuesday, 3 November 2015. This date lies in the first month of the Hijri year 1437 AH, which is Muharram of 1437 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1437/01/21 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 3 November 2015 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Muharram 1437 AH to its equivalent Gregorian date.
وَلَنَبْلُوَنَّكُمْ حَتَّىٰ نَعْلَمَ ٱلْمُجَٰهِدِينَ مِنكُمْ وَٱلصَّٰبِرِينَ وَنَبْلُوَا۟ أَخْبَارَكُمْ
And verily We shall try you till We know those of you who strive hard (for the cause of Allah) and the steadfast, and till We test your record.
Surah Muhammad(47:31)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: To say Takbir in front of the Corner (having the Black Stone)
Narrated Ibn `Abbas:
The Prophet (ﷺ) performed Tawaf of the Ka`ba riding a camel, and every time he came in front of the Corner (having the Black Stone), he pointed towards it with something he had with him and said Takbir.
Sahih al-Bukhari 1613