Well, the Hijri date 1 Muharram 1431 corresponds to the Gregorian date Friday, 18 December 2009. This date lies in the first month of the Hijri year 1431 AH, which is Muharram of 1431 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1431/01/01 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 18 December 2009 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Muharram 1431 AH to its equivalent Gregorian date.
يَوْمَ يَقُولُ ٱلْمُنَٰفِقُونَ وَٱلْمُنَٰفِقَٰتُ لِلَّذِينَ ءَامَنُوا۟ ٱنظُرُونَا نَقْتَبِسْ مِن نُّورِكُمْ قِيلَ ٱرْجِعُوا۟ وَرَآءَكُمْ فَٱلْتَمِسُوا۟ نُورًۭا فَضُرِبَ بَيْنَهُم بِسُورٍۢ لَّهُۥ بَابٌۢ بَاطِنُهُۥ فِيهِ ٱلرَّحْمَةُ وَظَٰهِرُهُۥ مِن قِبَلِهِ ٱلْعَذَابُ
On the day when the hypocritical men and the hypocritical women will say unto those who believe: Look on us that we may borrow from your light! it will be said: Go back and seek for light! Then there will separate them a wall wherein is a gate, the inner side whereof containeth mercy, while the outer side thereof is toward the doom.
Surah Al-Hadid(57:13)