Well, the Hijri date 15 Rabi Al Thani 1439 corresponds to the Gregorian date Tuesday, 2 January 2018. This date lies in the fourth month of the Hijri year 1439 AH, which is Rabi Al-Thani of 1439 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1439/04/15 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 January 2018 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1439 AH to its equivalent Gregorian date.
قَالُوا۟ بَلْ وَجَدْنَآ ءَابَآءَنَا كَذَٰلِكَ يَفْعَلُونَ
They said: Nay, but we found our fathers acting on this wise.
Surah Ash-Shu'araa(26:74)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The Ghazwa of Al-Hudaibiya
Narrated Jabir bin `Abdullah:
On the day of Al-Hudaibiya, Allah's Messenger (ﷺ) said to us' "You are the best people on the earth!" We were 1400 then. If I could see now, I would have shown you the place of the Tree (beneath which we gave the Pledge of Allegiance)." Salim said, "Our number was 1400."
Sahih al-Bukhari 4154