Well, the Hijri date 12 Muharram 1439 corresponds to the Gregorian date Monday, 2 October 2017. This date lies in the first month of the Hijri year 1439 AH, which is Muharram of 1439 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1439/01/12 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 2 October 2017 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Muharram 1439 AH to its equivalent Gregorian date.
قُلْ يَٰٓأَهْلَ ٱلْكِتَٰبِ تَعَالَوْا۟ إِلَىٰ كَلِمَةٍۢ سَوَآءٍۭ بَيْنَنَا وَبَيْنَكُمْ أَلَّا نَعْبُدَ إِلَّا ٱللَّهَ وَلَا نُشْرِكَ بِهِۦ شَيْـًۭٔا وَلَا يَتَّخِذَ بَعْضُنَا بَعْضًا أَرْبَابًۭا مِّن دُونِ ٱللَّهِ ۚ فَإِن تَوَلَّوْا۟ فَقُولُوا۟ ٱشْهَدُوا۟ بِأَنَّا مُسْلِمُونَ
Say: O People of the Scripture! Come to an agreement between us and you: that we shall worship none but Allah, and that we shall ascribe no partner unto Him, and that none of us shall take others for lords beside Allah. And if they turn away, then say: Bear witness that we are they who have surrendered (unto Him).
Surah Aal-i-Imraan(3:64)
Sahih al-Bukhari
Oaths and Vows
Chapter: The Covenant of Allah 'Azza wa Jall
Narrated `Abdullah:
The Prophet (ﷺ) said, "Whoever swears falsely in order to grab the property of a Muslim (or of his brother), Allah will be angry with him when he meets Him." Allah then revealed in confirmation of the above statement:--'Verily those who purchase a small gain at the cost of Allah's Covenant and their own oaths.' (3.77) Al-Ash'ath said, "This Verse was revealed regarding me and a companion of mine when we had a dispute about a well."
Sahih al-Bukhari 6659, 6660